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Food Allergies in Dogs

Posted December 23, 2011 in Dog Diet & Nutrition

Yes, Dogs can Have Food Allergies
Dogs, like people, can have allergies to certain foods. In fact, food allergies are one of the most common allergic reactions known to affect our canine buddies. When your dog is allergic to a particular food, his immune system responds to the food as it might respond to an infection or bee sting, producing antibodies that in turn cause the symptoms associated with the allergic response.

We all know dogs are “garbage guts” and will eat, well, a wide range of stuff. Sometimes it’s hard to distinguish a little upset stomach from an allergic reaction to food. When symptoms such as diarrhea persist, allergies may be the cause. These symptoms usually take time to develop, since your dog’s immune response takes time to produce the antibodies that cause the allergic response.

Symptoms of Food Allergies in Dogs

The most common symptoms of a food allergy are:

  • Itching 
  • Hair loss
  • Skin infection
  • Less common symptoms include: 
  • Vomiting
  • Diarrhea 
  • Weight loss 
  • Lethargy 
  • Hyperactivity 
  • Sometimes, dogs show more aggression because of their discomfort.

The most common foods that cause canine food allergies are proteins such as lamb, beef, chicken, and eggs. In addition, some dogs can be allergic to soy or gluten, which is found in wheat and similar grains. Some dogs may be allergic to preservatives or other food additives, as well.

When a dog eats a food he is allergic to, a vicious cycle occurs: he eats, his body produces an allergic reaction, and he becomes symptomatic, i.e., he itches, has diarrhea, or may vomit—which is why it is so important to identify the food for which he is having the reaction!

Diagnosing Food Allergies in Dogs
If your veterinarian suspects your poor pooch of having a food allergy, he or she will perform a thorough physical exam and take a detailed history of your dog’s food intake and activities. In addition, your veterinarian may recommend routine diagnostics to rule out other causes of your dog’s symptoms.

Your veterinarian will likely recommend a strict hypoallergenic diet trial for at least 2–3 months to see if it alleviates your dog’s symptoms. The suggested diet cannot contain any ingredients your dog has been recently eating; there are several specifically designed diets to help prevent food allergies. During the food trial, it is critical that your dog does not get any treats or supplementsunless approved by

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