I would leave him on the steroids for now. Usually they taper them off the steroids. Never take a pet or a human off steroids quickly as it can be very dangerous. The vet should have given you a taper down schedule for the steroid pills unless they are keeping him on a low dose maintenance dose for the summer. (which may not be a bad idea if he is that bothered by the allergies)
Some dogs are allergic to corn. It certainly should not be a first ingredient. There are some good grain free foods out there. Putting him on a good coat supplement may help also. Like Salmon oil or some other Omega3 oil.
Do you have a flea issue where you are? Some dogs have severe flea allergies that can be triggered by just one flea walking on the skin. I used to have a dog like that. He would be in sheer misery from on lousy flea. We always flea combed him after he came inside. He also needed frequent bathing with an all natural shampoo and conditioner. |