Man’s best friend can also share one of man’s worst enemies -Allergies. There is nothing as bad as a constant itch and constantitching is even worse in dogs who cannot even share their miserywith you. If your dog is constantly scratching, has red, inflamedskin or is losing his hair, he could have allergies.There are three types of allergies in dogs - inhalant allergies,food allergies and contact allergies. Inhalant allergies are themost common and hardest to treat. Contact allergies are the leastcommon. Identifying what type of allergy your dog has is the firststep in treatment. Dog allergy treatment is effective over 90% ofthe time.Inhalant allergies occur when a dog inhales a substance he isallergic to. This could be anything from dust mites to pollenoutside. Some people classify flea al