Updated July 2026
Harvest mites are tiny outdoor parasites that can cause intense itching and sore skin in dogs.
They are most commonly encountered from late summer into autumn, particularly during dry, sunny weather. Dogs pick up the larval mites from vegetation and the ground rather than directly from another dog.
Some dogs develop only mild irritation. Others lick, chew and scratch so persistently that the skin becomes inflamed, broken or infected.
Tiny orange dots or patches may sometimes be visible around the paws, legs, ears or underside of the body. However, you cannot rule out harvest mites simply because you cannot see anything.
Itching has many possible causes, including fleas, allergies, infections and other parasites. Your vet may therefore need to examine your dog and identify the cause before recommending treatment.
This guide explains what harvest mites are, where dogs encounter them, what signs to look for and why home remedies such as tea tree oil and garlic should be avoided.
For wider parasite advice, read Fleas and Ticks on Dogs: Signs, Checks and Safe Treatment.
The quick answer
Contact your veterinary practice when your dog develops:
- sudden or intense itching
- persistent licking or chewing
- tiny orange dots or clusters on the skin
- sore skin between the toes
- redness around the ears, legs or belly
- scabs, hair loss or broken skin
- swelling or discharge
- pain when the skin is touched
- signs that continue after leaving the suspected area
Do not automatically use:
- tea tree oil
- garlic sprays
- garlic supplements
- essential oils
- human antihistamines
- leftover flea treatments
- an unprescribed antiparasitic shampoo
- creams intended for people
- another pet’s medication
Different skin problems can look very similar.
The safest treatment depends on the cause, the dog, any other pets in the home and products already being used.
What are harvest mites?
Harvest mites are members of the Trombiculidae mite family.
The species most commonly associated with dogs and cats in Europe is Neotrombicula autumnalis, also known by the older name Trombicula autumnalis.
Only the tiny six-legged larval stage lives temporarily on animals. The later stages live freely in the outdoor environment.
The larvae are:
- bright orange
- approximately 0.2 to 0.3 millimetres long
- sometimes visible as orange dots or clusters
- most active in dry, sunny conditions
- commonly encountered between July and October in temperate climates
They climb vegetation and wait for a suitable animal or person to pass.
Why are they called harvest mites?
The name comes from their seasonal activity.
In the UK and other temperate areas, the larvae are commonly active from late summer into autumn, historically around harvest time. Their numbers and activity can vary according to weather and location.
Other names sometimes used include:
- autumn mites
- chigger mites
- red bugs
- scrub mites
- berry bugs
The terminology varies, but the practical concern is the same: the larval mites attach to the skin and can cause marked irritation.
Where do dogs encounter harvest mites?
Dogs normally collect harvest-mite larvae from outdoor environments such as:
- long grass
- low vegetation
- woodland edges
- fields
- rough ground
- gardens
- areas containing decomposing vegetation
- locations where infestations occurred previously
Harvest mites often occur in highly localised patches.
A dog may repeatedly become itchy after visiting one particular field or section of a walk while remaining unaffected elsewhere.
ESCCAP notes that avoiding locations where harvest mites were found during a previous season is the most practical preventive measure.
Do not assume that every grassy park presents the same level of risk.
The pattern may be limited to one route, verge or area of vegetation.
How do dogs pick up harvest mites?
The larvae climb onto a dog when their bodies brush against affected vegetation or the ground.
They tend to attach to areas that:
- contact the ground
- have thinner hair
- are warm
- are easier for the mites to reach
They remain temporarily on the dog while feeding, then drop back into the environment to continue their development.
Harvest mites do not remain permanently on the dog and complete their whole life cycle there.
Are harvest mites contagious between dogs?
Harvest mites are acquired from the outdoor environment.
They are not normally passed directly from one dog to another.
Several dogs walking through the same affected patch may all collect mites, but that does not mean one dog infected the others.
This differs from more contagious mite conditions, such as some forms of mange.
Because several skin parasites can cause similar signs, your vet may need to establish which mite or skin condition is involved.
How do harvest mites affect the skin?
Harvest-mite larvae remain on the surface rather than burrowing deeply into the skin.
They pierce the outer skin and release enzymes that break down tissue to feed. These secretions can trigger intense irritation and itching. (Vca)
The dog may then:
- scratch
- lick
- nibble
- rub
- bite at the affected area
Much of the visible damage can result from the dog repeatedly trying to relieve the itch.
Persistent scratching and chewing may lead to:
- inflammation
- hair loss
- scabs
- raw skin
- bleeding
- moist sores
- secondary bacterial or yeast infection
BSAVA explains that itchy dogs can make the skin significantly more inflamed through licking, biting and scratching, sometimes leading to widespread redness, scabbing and hair loss.
Which parts of a dog are commonly affected?
Harvest mites are often found on areas that come close to the ground or have relatively thin hair.
Check:
- between the toes
- around the paw pads
- lower legs
- belly
- groin
- armpits
- chest
- around the ears
- ear flaps
- muzzle
- face
ESCCAP identifies the head, ears, legs, feet and underside of the body as common ground-contact areas for lesions.
Mites may appear elsewhere, so do not concentrate only on the paws.
What do harvest mites look like?
Individual larvae are extremely small.
When several feed together, you may see:
- tiny bright-orange dots
- orange-red patches
- orange material that looks like dust
- clusters around inflamed skin
They may be easier to notice between toes, around the ear or where the coat is thin.
A magnifying glass and good lighting may help, but avoid repeatedly handling painful skin.
Not every affected dog has easily visible mites. A dog may remove them while grooming, or the larvae may already have detached by the time you check. (
Signs of harvest mites in dogs
Possible signs include:
- sudden itching during late summer or autumn
- repeated paw licking
- chewing between the toes
- scratching around the ears
- rubbing the face
- red or inflamed skin
- small bumps
- scabs
- hair loss
- raw or moist areas
- orange dots or clusters
- sensitivity when touched
- interrupted rest
- reluctance to walk when the feet are sore
Some dogs develop a much stronger reaction than others.
Repeated exposure can cause significant hypersensitivity and severe itching in susceptible animals.
Harvest mites are not the only cause of itching
Do not assume that every itchy dog seen between July and October has harvest mites.
Other possibilities include:
- fleas
- flea-allergy dermatitis
- ticks
- sarcoptic mange
- other mites
- bacterial infection
- yeast infection
- grass seeds
- contact irritation
- environmental allergy
- food-related allergy
- insect bites
- painful paws
- ear disease
Several conditions may also occur at the same time.
BSAVA explains that pruritus is a symptom rather than a diagnosis and that allergies, parasites and infection may all contribute to a dog’s itching.
This is why treatment should not be chosen solely from an online photograph or the season.
How does a vet diagnose harvest mites?
Your vet will consider:
- the time of year
- where your dog has been walking
- the areas of skin affected
- the appearance of the lesions
- whether orange larvae are visible
- whether another parasite or skin condition is more likely
The mites may be identified through close examination or by examining material collected from a superficial skin scraping under a microscope.
Your vet may also investigate:
- fleas
- other mites
- infection
- allergies
- ear disease
- another underlying skin condition
Take photographs when orange clusters are visible, particularly if they may disappear before the appointment.
Do not delay the appointment merely to obtain a better photograph.
What should you do when you suspect harvest mites?
Stop the dog from damaging the skin
Prevent repeated chewing and scratching as far as you safely can.
This might involve:
- calm supervision
- interrupting persistent licking
- using protective equipment recommended by your vet
- keeping nails suitably maintained
- avoiding the suspected walking area
Do not bandage paws or apply a collar without checking that it is safe and appropriately fitted.
A dog that cannot stop biting at the skin may need prompt veterinary care to reduce discomfort and prevent self-trauma.
Check the affected areas
In good light, check:
- between the toes
- paw pads
- legs
- belly
- armpits
- ears
- face
Look for:
- orange dots
- redness
- broken skin
- swelling
- discharge
- scabs
- hair loss
- foreign objects
Stop when your dog becomes uncomfortable or defensive.
Painful dogs may growl or snap even when they are normally comfortable with handling.
Contact your vet
Seek veterinary advice when:
- itching is intense
- your dog cannot settle
- the skin is broken
- the ears are affected
- the feet are painful
- symptoms are spreading
- orange mites are visible
- signs keep returning
- you are unsure of the cause
Your vet can confirm the likely diagnosis and choose an appropriate treatment plan.
How are harvest mites treated?
Treatment depends on:
- whether mites are still present
- how irritated the skin has become
- whether the dog has damaged themselves
- whether infection has developed
- the dog’s age and health
- other parasite products already being used
- other pets in the household
A veterinary plan may involve:
- an appropriate parasite-control product
- medication to reduce inflammation or itching
- treatment for secondary infection
- measures to prevent further licking or chewing
- avoiding the affected outdoor location
ESCCAP and the MSD Veterinary Manual describe veterinary parasite treatment, along with symptomatic treatment when itching or secondary skin damage is significant.
Do not copy a treatment used for another dog.
Some parasite products suitable for dogs can be highly dangerous to cats, and effectiveness varies by parasite and product.
Do not apply tea tree oil
Tea tree oil and other concentrated essential oils may cause skin irritation and can be toxic when absorbed or swallowed. Dogs may ingest a topical product while licking their paws or coat. Blue Cross warns that some herbal skin products, including tea tree oil, may be toxic.
Do not use:
- neat tea tree oil
- homemade tea tree sprays
- essential-oil mixtures
- products intended for people
Contact your vet if tea tree oil has already been applied and your dog develops:
- drooling
- weakness
- poor coordination
- tremors
- vomiting
- unusual drowsiness
- skin irritation
Do not use garlic as a parasite remedy
The former article also recommended garlic, garlic juice and garlic-containing supplements.
Garlic belongs to the allium family and can be toxic to dogs and cats. It should not be used as a home parasite treatment or preventative spray. (PDSA)
Do not assume a product is safe because it is:
- herbal
- natural
- sold for pets
- recommended in an online group
- something another dog has tolerated
Natural substances can still cause poisoning, irritation or interactions with medication.
Do not give human antihistamines without veterinary advice
Some itchy dogs may be prescribed medication by a vet, but the correct approach depends on the cause and the individual dog.
Do not select a human antihistamine yourself.
Products may:
- contain unsuitable active ingredients
- contain additional decongestants
- interact with other medication
- be inappropriate for the dog’s condition
- delay treatment of infection or another cause
Your vet may choose tablets, sprays, creams, injections, or other forms of support based on the diagnosis.
Do not use leftover flea or mite treatments
A product may be:
- out of date
- incorrectly stored
- unsuitable for your dog
- incompatible with another treatment
- ineffective against the suspected parasite
- dangerous to another species in the home
Never apply a dog-only parasite product to a cat.
Keep the packaging of any product your dog already receives and tell your vet:
- the product name
- when it was given
- the dose
- your dog’s current weight
- whether other animals were treated
This helps prevent accidental duplication or unsafe combinations.
Should you use an antiparasitic shampoo?
Do not automatically use a shampoo simply because the dog is itchy.
The wrong product may:
- irritate already damaged skin
- remove evidence that would help diagnosis
- be ineffective
- be unsafe alongside another treatment
- encourage the dog to lick residues
- delay veterinary examination
Use medicated or parasite-control shampoo only when it is suitable for your dog and used according to veterinary or labelled instructions.
Plain bathing may also make some skin conditions more uncomfortable, so ask your veterinary practice when significant irritation is present.
Can you wash harvest mites off?
Bathing or rinsing may remove some surface material, but it is not a reliable substitute for diagnosis and treatment.
By the time you notice the itching:
- some larvae may already have detached
- the skin may be reacting to previous bites
- infection may have developed
- another condition may be responsible
Do not scrub inflamed areas.
Do not use hot water, disinfectants or household cleaning products on your dog’s skin.
Preventing harvest-mite exposure
Complete prevention can be difficult because the mites live outdoors and may occur in specific patches.
Practical steps include:
- avoiding locations where your dog reacted previously
- choosing another route during the active season
- keeping away from dense low vegetation in known problem areas
- checking the feet, legs, ears and belly after walks
- noticing whether symptoms follow one particular route
- keeping a record of dates and locations
- discussing suitable parasite prevention with your vet
ESCCAP identifies avoiding previously affected locations as the most useful preventive approach.
Do not stop providing all outdoor exercise unless your vet advises it.
A route change may be enough.
Keep a simple walking record
When itching repeatedly returns, write down:
- date
- route
- weather
- vegetation encountered
- when itching began
- areas affected
- photographs
- products already used
- how long the signs lasted
This can help determine whether a single field, path, or garden area is involved.
It also gives your vet more useful information than saying the problem happens “sometimes after walks”.
Checking your dog after a walk
After walking through long grass or a known problem area, check:
- Between the toes.
- Around the paw pads.
- Lower legs.
- Belly and groin.
- Armpits.
- Ears and ear flaps.
- Muzzle and face.
Use good lighting and gently separate the hair.
Do not probe deeply into the ear canal.
Contact your vet when the ear is painful, red, swollen, smells unusual or produces discharge.
An itchy ear may have a cause unrelated to harvest mites.
Should you clean the whole house?
Harvest mites are collected from the outdoor environment and are not directly passed between dogs. The larvae feed temporarily, then return to the ground to continue their development.
This means harvest mites do not behave like a typical household flea infestation.
Routine cleaning and washing your dog’s normal bedding may be sensible when skin problems are being assessed, but repeatedly treating carpets and furniture with insecticide is unlikely to address an outdoor source unless your vet identifies a different parasite.
Do not use household insecticides directly on pets.
Can cats get harvest mites?
Yes.
Harvest-mite larvae can affect cats as well as dogs, and the same European species may infest both.
Do not use a dog treatment on a cat.
Some dog parasite products contain ingredients that can be highly toxic to cats.
Seek veterinary advice for each animal separately.
Can people get harvest mites?
People can pick up harvest-mite larvae from the same outdoor environment.
They are not normally infected by the family dog passing the mites directly to them. (Vca)
A person may develop an itchy rash, particularly around areas that contacted vegetation.
Speak to a pharmacist, GP or other appropriate healthcare professional about human symptoms.
Your vet treats the animal rather than the people in the household.
When is itching an emergency?
Itching alone is not usually a life-threatening emergency, but prompt veterinary advice is appropriate when the dog:
- damages the skin severely
- bleeds
- develops marked swelling
- has facial swelling
- struggles to breathe
- appears weak or collapses
- develops widespread hives
- cannot settle because of discomfort
- shows signs of poisoning after a home remedy
- has a painful, swollen or infected foot
- develops discharge or a bad smell
- appears generally unwell
Serious skin infections can develop when persistent itching remains untreated.
Breathing difficulty, collapse or rapid facial swelling requires urgent veterinary help.
Harvest mites and rescue or nervous dogs
A nervous dog may find close body checks difficult.
Do not force them onto their side or restrain them roughly to search for mites.
Instead:
- begin with areas they normally accept being handled
- use good lighting
- check briefly
- pause regularly
- stop when they become tense
- photograph visible areas where possible
- ask your vet for handling advice
A muzzle should be introduced positively before it is needed wherever practical.
Pain and fear can change behaviour, so tell your veterinary practice when handling may be difficult.
My Rescue Dog Support in Finchley focuses on calm, low-pressure care for dogs who need more space and time.
How I manage suspected problem areas on walks
If a dog repeatedly becomes itchy after using one route, I would not keep taking them through the same vegetation to see whether it happens again.
Depending on the owner’s and vet’s guidance, I may:
- use a different route
- avoid a particular verge or field
- remain on clearer paths
- shorten contact with long vegetation
- check paws and lower legs after the walk
- tell the owner about licking or discomfort
- return home when the dog becomes distressed
My walks are one-to-one and begin from the client’s home, so I can adjust the route around the individual dog rather than taking a group through the same area.
Read about Solo Dog Walks in Finchley and Muswell Hill.
Frequently asked questions
What month do dogs get harvest mites?
They are most commonly active from late summer into autumn. ESCCAP describes a typical activity period between July and October in temperate climates, particularly during dry and sunny conditions.
What do harvest mites look like on a dog?
They may appear as tiny bright-orange dots or clusters, sometimes resembling orange dust. They are often seen between the toes, around the ears, on the legs or along the underside of the body.
Are harvest mites the same as fleas?
No.
Harvest mites are larval mites collected from vegetation and the ground. Fleas are different parasites with a different life cycle and control plan.
Can one dog give harvest mites to another?
They are typically acquired from the outdoor environment rather than transmitted directly between dogs.
Do harvest mites burrow into the skin?
They remain on the skin’s surface and feed by piercing the outer skin and releasing enzymes. They do not live deeply beneath the skin in the way owners sometimes imagine. (Vca)
Can harvest mites make a dog very itchy?
Yes.
The larvae and the dog’s reaction to them can cause intense itching. Repeated scratching and chewing may create raw skin, scabs, hair loss and secondary infection.
Can I use tea tree oil for harvest mites?
No home tea tree treatment should be used.
Tea tree oil may irritate the skin and can be toxic when concentrated, swallowed or absorbed. (Blue Cross)
Does garlic prevent harvest mites?
Garlic should not be used as a parasite treatment or preventative. Garlic belongs to the allium family and can be toxic to dogs.
Can I give my dog an antihistamine?
Only after speaking to your vet.
The product, formulation and dose must be suitable for your individual dog, and antihistamines will not address every cause of itching.
Will harvest mites disappear without treatment?
The larvae eventually detach, but irritation, self-inflicted damage or infection may continue.
A dog with significant itching should still be assessed and made comfortable rather than being left to scratch.
Do I need to treat my house?
Harvest mites primarily originate from affected outdoor environments and are not directly transmitted between dogs. Extensive household parasite treatment is not normally the main solution unless your vet identifies another parasite.
Should I stop walking my dog?
Not necessarily.
Avoid a known problem area and use another route. Speak to your vet if your dog has a severe or recurring reaction.
Can harvest mites affect cats?
Yes.
Cats can also be affected. Obtain species-specific veterinary advice and never apply a dog-only parasite product to a cat.
Do not treat every itch as harvest mites
Harvest mites can be intensely uncomfortable, but they are only one possible cause of itchy skin.
Look for patterns.
Check your dog after walks.
Photograph any visible orange clusters.
Avoid known problem areas.
Most importantly, do not apply tea tree oil, garlic or unprescribed medication in an attempt to treat the problem at home.
Your vet can identify whether harvest mites are present, check for infection and choose a treatment that is appropriate for your individual dog.
For wider parasite guidance, read Fleas and Ticks on Dogs.
For seasonal walking risks, visit Seasonal Pet Safety in Finchley.
Related Finchley Dog Walker guides
- Fleas and Ticks on Dogs
- Seasonal Pet Safety in Finchley
- Dog Walking Safety Tips
- Dog First Aid Guide
- Is Your Dog in Need of Medical Care?
- Rescue Dog Support in Finchley
- Solo Dog Walks
- Summer Dog Safety Guide
Veterinary disclaimer
This article provides general information about harvest mites and itchy skin in dogs.
It does not diagnose a skin condition, identify a parasite, prescribe medication or replace an examination by a veterinary surgeon.
Under the Veterinary Surgeons Act 1966, diagnosis and veterinary treatment are matters for an appropriately qualified veterinary surgeon.
Contact your veterinary practice if your dog develops significant itching, skin damage, pain, infection, facial swelling, breathing difficulty, or any other concerning change.
Do not preserve these in a “what people used to recommend” section.
