Welcome! So happy you found us. You're going to love it here.
He may not be a picky eater. He just may not like RC. I don't think it's probably a very tasty food. Mine has loved Natural Balance and hasn't gotten tired of it. They all need to find the one that they like. They all have different tastes for food. What one likes, another may hate. Perhaps try some samples. If you got it at some of the pet supply stores there, many will give you a refund if you return the bag with the receipt. Good luck in your search!