what do dog food allergies look like

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.

Allergies in Dogs and Puppies: Signs, Causes, and Treatment

Does your dog or puppy itch, scratch, chew, or lick themselves excessively? These are all signs that your dog may have allergies.

Allergies are common in dogsin fact, they are one of the top reasons for veterinary appointments. Dog allergy symptoms most commonly affect the skin and ears.

While humans often outgrow allergies, allergies in dogs tend to worsen as they get older. So how do you know if your dog has allergies, and whats causing them? Whats the best allergy treatment for dogs?

Heres what you need to know about dog allergies signs and what you can do to relieve your dogs allergies.

Key Takeaways

• Dogs can be allergic to many different triggers, including fleas, food, and items in their environment.
• Common signs of dog allergies include itching, licking, hair loss, and rashes.
• Treatment for dog allergies depends on what your dog is allergic to.

Types of Allergies in Dogs

Here are a few of the different types of allergies a dog can have.

Flea Allergies

An allergy to fleasis the most common skin disease seen in dogs. The bite of just one or two fleas per week is enough to make affected dogs itch. Flea saliva is believed to be the allergen that causes the itchiness.

Seasonal/Environmental Allergies

Also known as atopy,seasonal or environmental allergiesare caused by substances that exist in your home, backyard, and anywhere else your dog spends time.

These allergens can be inhaled, as with pollen, or absorbed through the skin when your dog touches them. Common triggers (allergens) for these allergic reactions include pollens, plant or animal fibers, dust mites, and mold spores.

Food Allergies

These are also known as adverse food reactions. Dogs can develop an allergy to a particular food at any point during their life, regardless of whether they have eaten these brands or types of foods in the past.

The most common food allergy for dogs is to a protein source in the diet, but sometimes the allergy is to grains and/or other ingredients.

Dog Allergies Signs

Dog allergies signs can include:

The type and severity of these signs depend partly on the type of allergy your dog has.

Signs of Flea Allergy Dermatitis in Dogs

The most common symptom of flea allergy dermatitis is itchy skin and irritation at the base of the tail, although other areas of the body may also be affected.

Seasonal/Environmental Allergy Signs in Dogs

Common symptoms include scratching/itchy skin, licking (especially the paws), and face rubbing. Affected dogs may also experience red skin, loss of fur, and recurrent skin and/or ear infections. You may see red skin or fur loss on your dogs paws and lower legs, face, ears, armpits, and belly.

Signs of Food Allergies in Dogs

The symptoms of food allergies are often the same as for seasonal/environmental allergies. There may also be GI signs, such as diarrhea, vomiting, or an increased number of bowel movements per day.

Is There an Allergy Test for Dogs?

Yes, but allergy testing in dogs is done for seasonal/environmental allergies only. Studies have shown thatblood testing and skin testing for food allergiesare not accurate in dogs. Studies have also shown that hair and saliva testing for seasonal or environmental allergies in dogs are not accurate.

Prior to performing allergy testing, your veterinarian should rule out other causes for your dogs allergy symptoms. Allergy testing should not be used to confirm that your pet has seasonal/environmental allergies, but to determine the specific things to which your dog is allergic.

Seasonal/environmental allergy testing can be performed in dogs by either skin testing or blood testing. Skin testing is the most accurate type of allergy test, and its generally performed by board-certified veterinary dermatologists.

Allergy testing should not be used to confirm that your pet has seasonal/environmental allergies, but to determine the specific things to which your dog is allergic.

For skin testing, mild sedation is required. The fur is clipped in a small area, and a series of very small amounts of allergens are injected into your dogs skin. The degree of the allergic reaction to each allergen determines whether your dog is allergic to it. The cost of these tests can range from $300$700.

Dog Allergy Treatment by Type

Treatment will depend on what the vet determines your dog is allergic to. Here are a few examples of how your vet might approach treating allergies.

Treatment for Flea Allergies

Treatment for flea allergy dermatitis is aimed at reducing the symptoms of itchy skin and irritation until the fleas are eliminated. To eliminate allergy symptoms in a flea-allergic dog, strict flea control is required.

There are many highly effective flea control products and medications available. Some are topical and come in the form of a liquid that you squeeze onto your dogs skin, such as Advantage, Revolution, or Vectra. Others are given orally in the form of chews, such as Simparica, NexGard, or Comfortis. Consult with your veterinarian to determine your best option.Oral preventions tend to be more effective than topical, but use cautionsome of the oral preventions have flavorings your dog might be allergic to.

In severe cases, a dogs environment must be treated for fleas as well. Vacuum thoroughly to remove eggs, larvae, and pupae, and discard the vacuum bag. You can use insecticides inside and outside your home to treat allflea life stages.

It is important to use an insecticide containing an insect growth regulator, such as methoprene or pyriproxyfen, to halt the development of flea eggs and larvae. You can hire a professional exterminator, but you should specify that the treatment is for fleas.

Treatment for Food Allergies

The treatment for food allergies in dogs is to feed a hypoallergenic diet for at least 12 weeks. This is the only way to determine if your dog has a food allergy.

Hypoallergenic diets either have limited ingredients with an uncommon protein source or are processed in a special way (hydrolyzed) to be less likely to cause allergic reactions. The concept is that a dog cannot be allergic to a food that they have not been exposed to before.

Consult your veterinarian to choose the proper diet. Over-the-counter foods are not recommended for a proper food trial. Treats, flavored medications, and human foods will also have to be eliminated during this trial period.

Other allergy treatment for dogs are aimed at reducing the symptoms while waiting to see if the diet change is helpful. Cytopoint, Apoquel, or steroids may be used to help control itching while waiting to see if a hypoallergenic food trial results in improvement of your dogs allergy symptoms.

Treatment for Seasonal/Environmental Allergies

If allergy testing has not been performed, then the treatment is symptomatic, meaning that it aims to reduce or eliminate your dogs symptoms. Treatments can include:

• Oral medications, such as Apoquel, Atopica, or antihistamines

• Injectable medications, such as Cytopoint

• Fatty acids

• Steroids

• Frequent bathing and other topical therapies, such as sprays, wipes, or a mousse

Steroids should not be used long-term in the management of allergies due to the risk of significant side effects.

If an allergy test has been performed, then the ideal allergy treatment for dogs is avoidance of the allergen. This is possible in a few, select circumstances, but most dogs are allergic to a variety of substances that can be difficult to avoid completely.

Most dogs are allergic to a variety of substances that can be difficult to avoid completely.

Other treatment can include an allergy vaccine, also known as immunotherapy, which is given either by injection under the skin (allergy shots) or by mouth. The goal of immunotherapy is to make the immune system less reactive to the allergy-causing substances.

The success rate of immunotherapy is 6070%. This is the best long-term approach to allergy control, especially in younger pets that experience symptoms most of the year. Symptomatic treatment can and should be given while starting immunotherapy. It may be many months before any improvement in symptoms is seen from immunotherapy alone.

Featured Image: iStock.com/bruev

WRITTEN BY

Leigh Burkett, DVM

Veterinarian

Dr. Leigh Burkett was born and raised in Northeast Tennessee. She received her undergraduate degree in Biology from Wake Forest University...