Allergies in dogs: recognizing symptoms and finding the right diet

Itching, red ears or constant paw licking - many dogs in Switzerland suffer from allergies without their owners noticing immediately. This is often followed by a long odyssey of ointments and shampoos without any real improvement. In this guide, you will learn specifically how to recognize typical allergy symptoms, what vets check and how you can give your dog lasting relief with the right diet.

How to recognize allergies in dogs at an early stage

Allergies in dogs usually manifest themselves via the skin and less via the gastrointestinal tract. Typical warning signs are recurring itching, redness in the armpits, groin or between the toes, frequent ear infections and a musty skin odor. If these problems occur over weeks, regardless of the season, or keep returning despite treatment, you should consider an allergy and consult your vet for a specific diagnosis.

Especially in the Swiss climate with humid autumns and warm summers, skin problems are quickly blamed on "weather" or "dirt" in the coat. So look out for patterns: Does your dog scratch itself, especially at night? Does he constantly lick his paws after walks in meadows or fields? Or do the symptoms worsen after certain food components such as beef, chicken or wheat? Such observations are worth their weight in gold for a veterinary diagnosis.

Typical symptoms of a dog allergy

• Constant scratching, biting or licking, especially on the paws, belly, ears and base of the tail
• Red, inflamed or scaly patches of skin, sometimes with hair loss
• Recurrent ear infections, brownish earwax, head shaking
• Musty odor, greasy coat or increased dandruff
• In some cases, diarrhea, flatulence or frequent grass eating

Not every itch is immediately an allergy - parasites, fungi or mechanical irritation must always be ruled out first. However, if the symptoms persist despite treatment or recur after stopping the medication, a structured allergy assessment is the next sensible step.

The sooner you take action, the better you can prevent your dog from "scratching himself" and developing bacterial or yeast infections. A well-controlled skin condition is also important, especially for family dogs in multi-family homes, in order to reduce odor and cleaning effort in everyday life.

Typical triggers of allergies in dogs

The most common allergies in dogs are flea saliva allergies, environmental allergies (e.g. pollen, house dust mites) and food allergies. In practice, there is often a combination of these, meaning that several adjustments need to be made at the same time. Simply changing the food "into the blue" therefore rarely solves the problem permanently.

Flea saliva allergy is still underestimated in Switzerland. Even a single flea bite can trigger massive itching in sensitive animals, even if you never see a flea. Complete parasite prophylaxis is therefore a basic requirement before a food allergy is assumed to be the main cause.

Food versus environmental allergy

In the case of a food allergy, the dog reacts to certain proteins or, more rarely, carbohydrates in the food - for example beef, chicken, dairy products or wheat. The symptoms are usually present all year round. Environmental allergies often occur more frequently seasonally, for example in spring when there is pollen or in poorly ventilated homes with lots of house dust mites.

In reality, these forms often overlap: a dog with a basic sensitivity reacts more strongly to grass pollen in summer and at the same time tolerates food limits less well. This explains why allergy management must always be considered holistically - from the home to the stable to the choice of food.

The right diet for allergic dogs

Diet is one of the most important levers for allergies in dogs, but it is no substitute for a veterinary diagnosis. First of all, a vet should rule out parasites, infections and other skin diseases. If a food allergy is suspected, a consistent elimination diet with clearly limited ingredients should ideally follow. Only if your dog responds to such a diet is it worth switching to a suitable allergy food in the long term.

For an elimination diet, choose a protein source that your dog has hardly or never eaten before (e.g. horse, kangaroo, insect protein) and a well-tolerated carbohydrate source such as potato or rice. It is important that only this food plus clear water is given during this time - no chewables, no table scraps, no "grandmother's exceptions".

For dogs with several food intolerances, foods with only one animal and one plant source ("limited ingredient diet") are often particularly helpful. When making your choice, make sure that the declaration is transparent and that treats and chews also match the same recipe, so that you do not sabotage the success of the diet unnoticed.

Practical feeding in everyday life in Switzerland

In families with children, on farms or in multi-person households, it is crucial that everyone is aware of the dog's allergy. Clarify that bread crusts, leftover cheese or sausages from the barbecue are taboo during the diet. Have a tin of "allowed" treats ready so that the dog can still be rewarded without his allergy flaring up.

Food storage also plays a role: store dry food in a dry and cool place to reduce mite infestation. Sensitive dogs react not only to food ingredients, but sometimes also to other food inhabitants such as storage mites or house dust mites, which thrive in poorly stored food.

Avoid common mistakes when dealing with allergic dogs

Many dog owners fail less because of the choice of food than because of consistent implementation. Short-term improvements are overrated and relapses are misinterpreted. Knowing the typical mistakes saves time, nerves and unnecessary veterinary costs.

• Test phases too short: Skin needs weeks, not days, to settle down.
• "Secret" additional nibbles: Children, neighbors or passers-by give treats.
• Constant food changes: The dog gets something different every few days "to try".
• Homemade mixed diets without planning: Many ingredients, hardly any overview.
• Underestimating fleas and mites as itch intensifiers.

If you realize that you cannot consistently stick to the diet in everyday life, it makes more sense to simplify the concept instead of constantly "cheating". A clearly defined, well-tolerated complete food with suitable supplements for treat situations is often more practical than a complex diet plan that is difficult to follow.

When special diet food really makes sense

Special diet foods for dogs with allergies are useful if a food allergy has been suspected or confirmed by a vet, your dog suffers from chronic itching or gastrointestinal problems and conventional foods do not bring sufficient improvement. They are particularly suitable for owners who are looking for a practical, clearly declared long-term solution and do not want to cook their own food every day.

Special foods are less suitable if the primary cause is environmental or flea allergies and the existing food is well tolerated. In such cases, other measures such as parasite control, room hygiene and, if necessary, allergy therapy are more important. For healthy dogs without symptoms, "precautionary" allergy food brings no added value and is more of an unnecessary restriction.

If you choose a diet food, look for a clear declaration, high-quality protein sources and a formula that you can feed long-term. Also consider how well the food suits your everyday life - whether in a detached house, a city apartment or on a farm with several dogs.

Conclusion: Step by step to a better quality of life

Frequently asked questions about allergies in dogs