Harvest Mites in Dogs in the UK: Signs After Autumn Walks

If your dog comes home from a late-summer or autumn walk licking their paws and you can see tiny orange-red specks between the toes, harvest mites are the likely cause. They make the skin intensely itchy but are not usually dangerous, and your vet can confirm them and treat the itch.

A dog that is sick, has diarrhoea or seems unwell after a woodland walk is different. That can be seasonal canine illness, a rare but serious condition that needs a vet straight away.

What harvest mites are

Harvest mites are tiny, bright orange mites called Neotrombicula autumnalis. They live in soil and are common in grassy and wooded places. The larvae attach to animals that pass through these areas and feed from the skin.

In the UK, they are most active from July to November, so late summer and autumn are the times when many owners notice a problem. A walk through a grassy verge, an overgrown patch or woodland can be enough for a dog to pick them up.

The mites tend to settle where the skin is close to the ground or easy to reach. Check between the toes, around the feet and lower legs, and under the tummy. The armpits and genital area can also be affected, and mites occasionally cause trouble in the ears.

They may be visible as clusters of very small orange or red dots on the skin or in the fur. You may not always see them, particularly on a dark-coated dog or where the fur is thick. What often stands out first is a dog that suddenly cannot leave one area alone.

Signs to look for after a walk

Itching is the usual sign. Some dogs are mildly itchy, while others are intensely uncomfortable and keep scratching, licking, biting or chewing at the same place. The skin can become painful as well as itchy when it is very inflamed.

Look over your dog after a walk if they seem bothered by their paws, legs or tummy. Signs that fit with harvest mites include:

• Tiny orange or red dots on the skin or fur
• Red, inflamed patches of skin
• Frequent licking, biting, scratching or chewing, often around the paws and legs
• Fur staining caused by repeated licking and biting
• Yellow scabs or pus

The areas between the toes and on the tummy are often easier to inspect than the rest of the coat. Take a calm look in good light rather than making a big fuss, especially if the skin is sore.

Persistent licking and scratching can damage the skin. That can leave a dog more uncomfortable and may lead to scabs or discharge, so it is sensible to contact your veterinary practice rather than waiting for the irritation to settle on its own.

When to speak to your vet

Contact your vet if you think your dog has harvest mites. They may be able to see the mites during an examination. When mites cannot be seen, or the signs are unusual, the vet may take skin scrapings and send them for analysis.

Call sooner if your dog is very itchy, seems painful or has yellow scabs or pus. A dog that is shaking their head and seems troubled by an ear also needs a veterinary check. These signs can mean the skin needs treatment, and a vet can work out what is causing the problem.

There is no product made specifically for harvest mites, although some flea treatments can work against them. Your vet is likely to prescribe a medicine to kill the mites and may also give anti-inflammatory treatment if the skin is very itchy. Dogs with a severe infestation and infected skin may need further treatment.

It is tempting to use a flea, tick or skin product that worked for another dog, but it is better to ask your vet first. The right plan depends on your dog and the products they already receive. Follow the advice from your practice rather than adding or changing treatments yourself.

Reducing contact on autumn walks

You do not need to give up autumn walks because of harvest mites. If your dog has had them before, though, it is useful to think about the places you visited before the itching started. Avoiding a known patch of long grass, woodland edge or overgrown ground during the risk months can reduce the chance of another infestation.

Where you can, keep to paths that mean less contact with long grass and dense plants. A lead can make this easier in an area where your dog is likely to push through vegetation. This cannot remove all risk, because mites live in the environment, but it can limit contact with likely places.

Make a quick check of your dog part of the routine when you get home. Look at their feet, legs, tummy and ears, paying close attention between the toes. Checking the coat and skin after walks may help you spot orange specks before the itching becomes severe.

A damp cloth can be used to wipe areas where mites may be present, but this is not a replacement for veterinary care if your dog is itchy or you can see mites. If there are orange specks, sore skin or repeated licking, call your practice for advice.

Your garden may also be a place where a dog meets harvest mites. Keeping the grass short and clearing plant waste and fallen leaves where practical may reduce suitable hiding places. It will not make a garden free of mites, so keep checking your dog if they begin to scratch during the season.

PDSA says dogs on regular flea treatment are unlikely to catch harvest mites. Even so, do not change your dog’s parasite routine without speaking to your vet. They can advise whether the product you use suits your dog’s lifestyle and whether anything needs to change during mite season.

Seasonal canine illness after woodland walks

Seasonal canine illness (SCI) is a separate condition from a harvest-mite infestation. Cases are seen from August to November, peaking in September, and signs usually start within one to three days of a walk in woodland. Its cause is still unknown. Many affected dogs have been found carrying harvest mites, so the mites are suspected of playing a part, but that link has never been proved, and the great majority of dogs with harvest mites do not develop SCI.

Signs can become severe within hours. They include:

• Vomiting, which is the main sign
• Diarrhoea
• Lethargy
• Tummy pain
• A high temperature
• Muscle tremors

Contact your vet immediately if your dog develops these signs after a woodland walk, even if you have also seen mites or itchy paws. Do not wait to see whether a stomach upset settles. PDSA warns that SCI can be fatal if left untreated, although most dogs that are treated early recover well. If your usual practice is closed, call its out-of-hours number or an emergency veterinary service.

When you call, explain when and where your dog walked, when the signs began, and whether you noticed itching, sore skin or orange specks. This gives the veterinary team a clearer picture while they advise you on the next step.