Dogs with an allergy have an immune system that overreacts and produces antibodies to substances that it would normally tolerate. This over-response is known as an allergic or hypersensitive reaction. Allergies can develop to any substance that a dog is frequently exposed to, such as food, fleas and seasonal environmental allergens such as grass or pollen. What Are the Symptoms of Dog Allergies? Although there are many symptoms, the most common symptom associated with dog allergies is itching of the skin and ears. In certain cases, the symptoms also involve the respiratory system which causes coughing, sneezing, and or wheezing. …
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