Allergies are common ailment in dogs. There are three main types of allergies, these are: food based allergies which are treated by an elimination process of certain foods from the dogs diet; Contact based allergies which is caused by a reaction to a topical substance such as bedding, flea powders, dog shampoos and other chemicals. Contact allergies are also treated by removing the cause of the allergy. The third allergy is inhalant-based allergies, which are caused by airborne allergens such as pollen, dust, mildew, etc. The treatment for inhalant allergies is dependant upon the severity of the allergy but can be treated with steroids. It is important to note that in the case of inhalant allergies, ear infections can become common. Allergy symptoms can be skin rashes, itching and sneezing.