Hi April, it could be seasonal allergies, or it could be food allergies. Even if he's been on the same food for a while, they can develop allergies. I have been feeding my two guys Fromm's Beef Frittata for the past 2 years and 3 months, due to my female Blossoms allergies to chicken, salmon, corn and grains. My male never showed any allergies until now. He started shedding like crazy, more than normal, he was licking his paws, and he started smelling yeasty, from his ears. I suspected allergies, and switched them to Fromm's Lamb and Lentil about a month ago, both of them seem to be tolerating this food okay, and poops are good. I give my guys 2 Tbsp of plain yogurt on their morning kibble for the probiotics, this is great for digestion and it boosts the immune system which fights both infections and allergy symptoms. I also add 1 Tbsp of apple cider vinegar to their drinking water everyday, there are a lot of health benefits to ACV, such as its a natural anti inflammatory, it kills the bad bacteria in the body, so boosts the immune system, and it balances the Ph levels of the blood. I also add coconut oil to the evening kibble, for the Omega Fatty oils, which are beneficial to the skin, coat, and brain.