This is very encouraging to hear. I realize grain-free isnt best but ultimately it's better than him pooping out the nutrients of grain inclusive dog food. I'll look into taurine to supplement if we keep with the grain-free long term. Out of curiosity, what brand have you been feeding him?Agis's eyes were like that as a pup - he didn't have issues (we checked), just how he was. I would still ask your vet to be sure.
We fed Agis a grain-free food, because he was a poor eater on grain-inclusive (we tried two) and had some issues getting his grain-inclusive food on vacation - really we found out he goes crazy for grain-free by sheer chance. He loves his food now, and our vets - who are big promoters of grain - have said, the best food is the one he'll eat. We add powdered taurine to offset the fact that it's grain-free.