Thanks so much for getting back to me! I spent an hour+ this morning comparing all of the formulas they offer. haha and I am torn between the mini puppy and the yorkie puppy. I will probably try the mini first to see if he likes it, and go from there.
I did talk to the vet about keeping him on the gastro, but she feels that assuming he does not need it long term, its best to feed him a regular food and suggested trying a non-rx royal canine line.
At least you can bring it back if he doesn't like it!