Many of the most common signs and symptoms of your dog struggling with allergies includes frequent licking and scratching, face rubbing, ears that itch, sneezing, vomiting, and even diarrhea. Other signs range from ear infections and watery, itchy eyes. When left untreated, allergies can lead to other problems including hot spots. These spots can cause your pet lots of pain, especially if they become infected.
Normally a dog will demonstrate signs of allergies around age three, if not sooner. Some dogs will not show signs until much later in life, sometimes as late as age eight or nine. Several things can cause dog allergies with the most common cause fleas. The flea saliva, not the insect, causes the hypersensitive reaction. Even one flea could cause much grief to get a dog that has hypersensitivity to it. Treat your pet immediately in the first manifestation of fleas to get rid of this problem.