Pawtree Question

Hi Everyone!

Ashley, I’m going to switch Norman over to Pawtree food, but I’m having trouble figuring out which one to choose. Norman has food sensitivity to poultry, but I don't want one that's completely grain free. I was going for the fish option, but after doing research, that one is suitable if he's overweight. Norman has always been on the slender side. I would love your suggestion. Thank you!!