Hi and welcome to Boxer Forums.
The most common allergen is food. What are you feeding Rocko? If you are feeding a chicken based food, maybe try a lamb and rice or venison and potato. Other high allergens in foods are wheat, soy, and corn.
Here is a great article on dog allergies: http://www.veterinarypartner.com/Conten ... C=0&A=1699
Good luck, it can be very frustrating figuring out what is causing this, but I would definitely start with changing his food.
The most common allergen is food. What are you feeding Rocko? If you are feeding a chicken based food, maybe try a lamb and rice or venison and potato. Other high allergens in foods are wheat, soy, and corn.
Here is a great article on dog allergies: http://www.veterinarypartner.com/Conten ... C=0&A=1699
Good luck, it can be very frustrating figuring out what is causing this, but I would definitely start with changing his food.