What to feed a dog with skin allergies
Once a vet suspects a food allergy is behind a dog's skin problems, diet becomes a genuine part of managing it — but that starts with a proper diagnostic process led by a vet, not with trying a different bag of food at home and seeing what happens. Skin allergies can also be environmental rather than food-related, which is exactly why identifying the actual cause comes before any diet change.
Why 'skin allergies' still needs a vet's diagnosis first
Allergic skin disease in dogs can come from several different sources — food, environmental allergens like pollen or dust mites, or flea saliva among the most common — and these can look very similar from the outside despite needing different management. A vet examining a dog directly, sometimes alongside specific testing, is how the actual trigger gets identified rather than guessed at.
Even where food is confirmed or strongly suspected as a factor, working out which specific ingredient is responsible is a structured process rather than something worked out by trial and error with different commercial diets bought one after another.
How an elimination diet trial actually works
Where a food allergy is suspected, a vet will often recommend a strict elimination trial — feeding a diet with a very limited, unfamiliar ingredient list for a set period, with nothing else added, before reintroducing other foods one at a time to see what triggers a reaction.
This has to be run properly to mean anything, which means no other treats, table scraps or flavoured medication during the trial period, since even a small amount of an outside ingredient can undermine the results. It is a vet-supervised process rather than something to run informally at home.
Reading labels once a trigger is suspected
Once a specific protein or ingredient is identified as a likely trigger, a novel protein diet — built around a protein your dog has not eaten before, such as venison or duck if they have mainly eaten chicken and beef — is one common approach, since a food is much less likely to trigger a reaction to an ingredient the immune system has never encountered.
A prescription hydrolysed protein diet, where the protein is broken down into pieces too small to trigger a reaction, is a different and more clinically managed option a vet may recommend for a confirmed case, and is not the same thing as an over-the-counter food simply labelled 'hypoallergenic' or 'limited ingredient'.
What diet can't fix
Diet cannot resolve a skin allergy caused by something other than food, such as an environmental allergen or fleas, however carefully the food itself is chosen, which is exactly why the earlier diagnostic step matters so much rather than jumping straight to a new bag of food.
Persistent scratching, hair loss, red or broken skin, or a smell coming from the skin or ears are all reasons to see a vet promptly, whether or not a food change is already underway, since these can indicate the current approach is not addressing the actual cause.
Foods formulated for this
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Pro Plan 1+ Adult Dog Sensitive Skin Medium Breed Salmon
Dry food for medium breed adult dogs with sensitive skin, made with 17% salmon
£78.49
Johnson's Tea Tree Skin Cream
A 50g tea tree cream to soothe and calm itchy skin in dogs, cats and other pets
£4.79
Johnson's Skin-eze
A traditional sulphur cream for minor skin affections in dogs, cats and other pets
£4.55
Petkin Paw&skin Balm 3.5oz
A paw and skin balm for dogs and cats, 3.5oz, for cracked or dry paw pads
£5.49
YuDerm Yumove Skin Coat Care Itching for Adult Dogs
An Omega 3 and 6 oil pump for adult dogs with itchy skin, added straight to food
From£24.99
Johnson's Tea Tree Skin Calm
A 150ml aloe vera and lavender spray to soothe calm skin irritations in dogs
£5.09
Bugalugs Pre, Post + Probiotic Itchy Skin Spray for Dogs 200ml
A coat and skin spray for dogs from 8 weeks, with every ingredient listed on the bottle
£11.99
Lillidale Skin Ointment
A calamine, sulphur and coal tar ointment for localised itching and dry, flaky skin
£6.99
Bugalugs Antiseptic Itch Skin Relief Spray
Bugalugs Antiseptic Itch Skin Relief Spray: hypochlorous-acid animal spray with hypochlorous acid
£9.99
Common questions
- Can I just try a hypoallergenic food without seeing a vet first?
- It's better not to. A vet needs to establish whether food is actually the cause before an elimination diet or any specific food change is worthwhile, since environmental allergens or fleas are common alternative causes that a food change won't help.
- What is the difference between a novel protein diet and a hydrolysed diet?
- A novel protein diet uses a protein your dog has not eaten before, on the basis that a new protein is less likely to trigger an existing sensitivity. A hydrolysed diet breaks the protein down into pieces too small to trigger a reaction at all, and is generally a more clinically managed, vet-directed option.
- How long does an elimination diet trial take?
- Trials are typically run for a set period agreed with your vet, often several weeks, with strictly nothing else added to the diet during that time. Your vet will advise on the exact length and how reintroduction is then managed.
- Are over-the-counter 'hypoallergenic' foods the same as a prescription diet?
- No, an over-the-counter food labelled this way is not the same as a prescription hydrolysed diet, which is formulated and tested to a different standard for confirmed food allergy cases. Check with your vet about which is appropriate for your dog.
Related
Sources
Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.