We feed our dogs (Gibson 6 month old GSD and Patron 10yr old Malamute) Diamond rain free dog food. We switched to grain free because of the skin rashes, and the constant biting and scratching. We stopped buying them the chicken and stuck to the beef and white fish. Has anyone else experienced this while feeding their dogs grain free food? I made an appointment with the vet. Just wanted to see who else had these issues and what could be done to alleviate the irritated skin, and constant non stop scratching.