What to feed dogs with skin allergies
Types of Dog Allergies and How to Treat Them
Have you heard someone tell you that their dog has allergies? Has your veterinarian suggested that allergies could be a problem for your dog? Do you suspect that your dog has allergies? If so, then youve probably realized that allergies in dogs are not quite as simple as we might wish. For starters, there are several different types of allergies that could be causing your dogs symptoms.
Allergies are a misguided reaction to foreign substances by the bodys immune system, which, of course, people and pets can suffer from. There are quite a few different types of allergies in dogs. Skin allergies, food allergies, and environmental allergens all pose challenges for dogs and their owners, and to make things more complicated, the symptoms of all these different types of allergies can overlap.
Symptoms of Allergies in Dogs
The symptoms of allergies in dogs may vary depending on the cause. A dog that goes into anaphylactic shock, for instance, will have a drop in blood pressure followed by shock, which is very different from a skin condition.
In general, however, the following symptoms could be a sign of an allergic reaction.
- Itchiness
- Hives
- Swelling of the face, ears, lips, eyelids, or earflaps
- Red, inflamed skin
- Diarrhea
- Vomiting
- Sneezing
- Itchy ears
- Chronic ear infections
- Itchy, runny eyes
- Constant licking
Some of these symptoms could also be a sign of another condition. Make an appointment with your veterinarian if you notice changes in their behavior to get an accurate diagnosis.
Types of Allergic Reactions in Dogs
Allergic Dermatitis in Dogs
Skin allergies in dogs, known as allergic dermatitis, is the most common type of allergic reaction in dogs. Skin allergies in dogs are mainly caused by one of three things: fleas, food allergies, and atopicor environmentalallergies.Flea allergy dermatitis is an allergic reaction to fleabites, and some dogs are allergic to flea saliva, which can cause their skin to become red, inflamed, or scabbed because their skin will feel extremely itchy. Its the easiest type of allergic dermatitis to treat, since you can apply flea medication for dogs to help heal their skin.
Another cause of skin allergy in dogs is from food allergies and sensitivities. Just like humans can be allergic to certain foods or ingredients, dogs can be allergic, which can cause itchy skin. Dogs with food allergies usually have itchy ears or paws, sometimes along with gastrointestinal symptoms. Dr. Klein, Chief Veterinary Officer for the AKC, says that food allergies are not as common as you might think. True food allergies result in an immune response, which can range in symptoms from hives, facial swelling, and itchiness to gastrointestinal signs like vomiting and diarrhea or a combination of both.
Environmental allergens can also affect the skin and be the cause of allergic dermatitis. Things like dust, pollen, fungus, and mold can cause these reactions, but in most cases, these allergies are seasonal. As with food allergies that affect the skin, the most commonly affected areas are the paws and ears (but also include the wrists, ankles, muzzle, underarms, groin, around the eyes, and in between the toes).
All skin allergies pose the risk of secondary infection. As your dog scratches, bites, and licks at his skin, he risks opening up his skin to yeast and bacterial infections that may require treatment.
Urticaria, or Hives, in Dogs
Also known as urticaria, hives on dogs are very itchy but are not life-threatening. Hives appear as a reaction anywhere from 6 to 24 hours after exposure to allergens. This consists of itchy, swelled skin, that usually looks like a red rash. Its easiest to spot hives on dogs that are hairless or have short coats. Dogs with longer hair can get them too, but its more likely that youd be able to fee the hives rather than see them. Your vet will prescribe an antihistamine in order to treat urticaria in dogs.
Edema of Face or Throat
Swelling of the throat or face looks severe, but its actually almost never fatal. This area of swelling, which can also include swelling of the eyelids or ear flaps, is known as angioneurotic edema. Its actually pretty easily treated, and despite how it looks, its a good sign in terms of allergic reactions.
If your dog has edema of any of these areas, the time for a fatal allergic reaction has most likely passed, and they arent in as much danger. Angioneurotic edema occurs anywhere from 30 minutes to a few hours after exposure to an allergen, and can also come with hives.A veterinarian will often give dogs with this reaction an antihistamine injection. Untreated, it may take a day or two for the swelling to subside.
Anaphylactic Shock
Perhaps the most alarming of all the types of allergic reactions in dogs is anaphylactic shock. Like people, dogs can go into anaphylactic shock if they have a severe reaction to an allergen. This happens when antibodies produced by the host react negatively to the allergen, dropping your dogs blood pressure rapidly and sending them into shock. This can be fatal if not treated, but luckily, anaphylactic reactions are rare in dogs.
This can be a response to any allergen, most commonly bee or wasp stings, or vaccine reactions. Because of this, your vet will always recommend keeping a close eye on your dog after theyve been given any new vaccine, drug, or food item, as they might be allergic.
If a dog has had a past incident and survived, the owner may carry an epipen, but sometimes the first occurrence can lead to death. Fortunately these reactions are very rare in dogs.
In some rare cases, a severe food allergy reaction resulting in anaphylaxis can occur, similar to severe peanut allergies in humans. The best way to diagnose and treat a food allergy is to work with your veterinarian to manage your dogs symptoms and discover the ingredient causing the reaction.
Diagnosing Allergies in Dogs
Flea allergy dermatitis is typically the easiest allergy to diagnose. It is usually diagnosed by identifying fleas on your dogs body and applying a product that kills fleas before they can bite to see if that solves the issues.
The first thing your veterinarian will do in allergy testing is rule out any other condition that could be causing your dogs symptoms. If your veterinarian feels that an allergy is a likely cause, they may propose allergy testing to try and determine the cause of the allergen that is causing the reaction. However, keep in mind it may not always be possible to determine the cause of an allergy with testing.
If you have ever undergone allergy testing, then you know that diagnosing allergies is often complicated. Its the same for dogs, but its worth it to understand what to stay away from when it comes to your dog.Food allergies are often diagnosed using an elimination diet. A food trial consists of feeding a dog one source of protein and carbohydrate for 12 weeks.
Treating Allergies in Dogs
The best way to treat an allergy is avoidance of the cause and allergen, which may not always be possible. They type of treatment depends on the type of allergy your dog has. For example, the best way to treat flea allergy dermatitis is to kill the fleas, whereas the best way to treat a food allergy or food intolerance is a change in diet.
Depending on the cause and severity of your dogs allergic reaction, your veterinarian will prescribe different things. For hives, they might suggest antihistamines, cortisones, medicated shampoos, whereas with food allergies they might suggest fish oil or other Omega-3 fatty acid supplements. For skin allergies, they might prescribe dog-safe anti-inflammatory wipes or shampoo on skin to provide irritation relief.
In addition to any lifestyle changes that might be necessary, your veterinarian may also prescribe an allergy relief medication for your dog that will help control the signs associated with the allergic reaction, such as itching and any secondary skin infections that might have developed as a result of the irritant.
If your dog has a severe allergic reaction, your best course of action is to get them to an emergency veterinary hospital as quickly as possible.
The Best Foods for Dogs With Allergies
Humans arent the only ones with allergiesour dogs can get them, too. Canine allergies can lead to numerous skin conditions that can be frustrating to manage. These allergies can be due to environmental causes or from the food our dogs eat.
Key Takeaways
- Dogs can be allergic to foods like beef, chicken, lamb, wheat, soy, eggs, corn, and nuts.
- Allergy tests for dogs are not reliable.
- The only proven way to tell what your dog is allergic to is to change their protein source or perform an elimination diet trial.
The most common symptoms of dog food allergies include:
Redness of the skin of the inner ears
Itchiness of the ears (chronic scratching of the ears or shaking of the head)
Ear hematomas
Chronic thickening of the ears
Chronic ear infections
Redness and itchiness of the feet or in between toes (foot chewing)
Chronic pododermatitis
Patchy hair loss along the neck and trunk
Chronic skin infections (with bacteria or yeast) that never seem to clear up
Skin issues are the most common dog food allergy symptoms. These are mostly seen as an allergic reaction to the proteins absorbed in food.
The reaction leads to the release of immune cells, which can cause weakening of the bonds between the skin cells, resulting in a weakening of the skin barrier. This change in the skin barrier leads to redness and itchiness, and it makes the skin more susceptible to infection with normal bacteria and yeast.
The most affected areas are the ears, paws, around the eyes, and sometimes the trunk (torso) and limbs.
What Are Common Dog Food Allergens?
The most common proteins dogs are allergic to are beef, chicken, lamb, and wheat. Other less common causes of dog food allergies include soy, eggs, corn, and nuts.
Dogs cannot be tested for food allergies like people can, as the available testing is unreliable. The only proven way to tell what your dog is allergic to is to change their protein source or perform an elimination diet trial.
During an elimination diet trial, you eliminate all proteins your dog has been exposed to for two to three months. This gives the body enough time to completely eliminate the old protein sources and heal from the chronic allergy stimulation.
How To Help a Dog With Food Allergies
An elimination diet trial withhydrolyzed foodis the best way to treat and diagnose a dog food allergy. Its easiest to start with a prescription diet, such asHills z/dorRoyal Canin Hydrolyzed Protein. Theseveterinary dietshave proteins that are too small to be recognized by the immune system.
An elimination diet trial takes approximately two to three months to complete. This time is necessary for the old proteins to leave the dogs system. Additionally, the dog must be on the diet long enough to see a difference from the previous food.
The most common mistake pet parents make is not waiting long enough before calling it quits on the diet trial. Changing what your dog is eating for just a week or two will not give you complete results, so taking the proper amount of time to test food and treats is crucial.
Another common mistake: feed a dog anything other than the elimination diet. During a diet trial, pets cannot have any table scraps or treats (unless the elimination diet has a compatible treat option).
Changing what your dog is eating for just a week or two will not give you complete results, so taking the proper amount of time to test food and treats is crucial.
If the symptoms do not resolve after two or three months on the hydrolyzed elimination diet trial, your dog most likely has some type of environmental allergen. Or something else is causing the problem, such as an autoimmune condition.
If you get a good response from the trial, try to feed your dog a new protein source, such as venison, fish, or kangaroo. If they are going to react to these proteins, you should notice a mild reaction starting within two weeks. If their allergy symptoms return, stop the new protein source and go back to the hydrolyzed food.
Try adding one protein at a time every two to four weeks. If your dog reacts, stop and keep things steady for another two weeks before trying a different protein.
Contact your veterinarian before starting any diet trial to get a prescription for a hydrolyzed diet. Its also important to see your veterinarian to make sure your pet doesnt have any concurrent infections, which can be common because of the disturbed skin barrier caused by the allergic reaction. Infections can look the same as dog food allergy symptoms, so you must make sure to clear all infections during the food elimination trial.
During the trial, remember:
Make sure the prescription treats and food are all that you are feeding your pet. You cant feed human food or regular pet treats with a food trial, as it can introduce the allergens youre trying to eliminate.
Alwaysintroduce a dog to a new diet slowlyto avoid stomach upset or diarrhea.
The Best Dog Food for Allergies
Hydrolyzed Dog Foods
Hydrolyzed foods are the best dog food for allergies because the proteins are broken down into pieces that are so small the body cant recognize them. Some of these foods include:
Novel Protein Foods
Novel protein diets include proteins that your dog has not been introduced to before, such as duck, fish, venison, and kangaroo. Some examples of novel protein diets are:
Foods for Puppies With Allergies
While its rare for puppies to have food allergies, there are some documented cases in pups as young as 6 months old. If you think your puppy may have a food allergy, lamb and rice formulas, such asPurina Puppy Lamb & Rice Formula, would be a good place to start for a novel protein.
If allergies are severe and your vet recommends a hydrolyzed diet, Royal Canin Hydrolyzed Protein does come in a puppy formulation.
WRITTEN BY
Robyn Gallucci, DVMVeterinarian
Dr. Gallucci started her career in veterinary medicine as a kennel assistant in high school and began training as a technician in college....
