There are many causes of dog allergies. The causes of respiratory allergies in dogs may be because of the pollution in the area it lives, dust particles, pollens and smoke. It is important to keep away such allergens which cause respiration problems in dogs. Sometimes foods also might trigger such kind of allergies.

Dogs are highly prone to skin allergies. The reasons for this might be foods. Dogs might be allergic to some foods. Normally, they are allergic to protein sources. In that case dogs must be given food that does not have proteins. Skin itching might be because of mold allergy. Molds grow on wheat and peanut hull which is used in pet foods. It is important to keep such foods in dry place. Humid and moisture conditions enhance growth of molds. Seasonal allergies are the most common cause of itching skin in dogs.

However, immunity as well as genetics plays a vital role in such allergy triggers. Apart from this, sometimes other pets like cats or other dogs shed dander or such other allergens. This might be the cause of allergy trigger. Even you or your family members might be shedding dandruff or such other allergens. Other causes of dog allergy can be chemicals that are exposed, fabrics, fleas and insect bite.