The typical signs of the allergies in dogs are itching, scratching, licking and biting (very often the paws). In response to the itch, your pet will use its legs to scratch, rub against a surface, bite or lick the skin.
The skin looks normal in the beginning, then becomes pink and red with some papules.
In some cases hot spots will appear. These are red, oozing, itching painful spots with hair loss.