what dog illness causes excessive shedding
What Causes Excessive Shedding In Dogs? All dogs shed (except American Hairless Terriers, as they are physically incapable due to their hairlessness). Most of the dogs shed year round, though some âblow their coatâ seasonally, once or twice a year. If your dog is shedding excessively, there could be a number of factors including allergies, hormonal imbalances, and nutrition deficiencies. 1.Excessive shedding due to Allergies: The hair of your dog could be falling out due to an allergic reaction to any of the following: 1  An allergy to a single ingredient in a canned or kibble food can cause hair loss.  Something in the environment such as a dog bed, or a household cleaner.