my dog had had red skin and was constantly biting and scratching himself and he would get sores where he would scratch so much. He also had some dandruff. I read about it on google and thought it could be a food allergy so i changed his food a while ago and it got better super fast, but he’s still constantly scratching and rolling around and i’m not sure why. His fur is a bit dry and rough so i’m thinking it could be his fur scratching him, i’m not sure. Is there any products or anything at all you would recommend?