Besides inhalant-induced allergic skin conditions, dogs can develop allergies to foods and flea bites. Apart from the typical skin issues mentioned above for inhalant allergies, food allergies may lead to head shaking, anal itching, licking of front paws, inflammation of the ears, rubbing of the face on carpets, diarrhea, vomiting, sneezing, flatulence, asthma-like symptoms, and in some severe cases, seizures.