[haleycookie]

I would probably start with switching foods. Do it slowly tho. Just introduce a new puppy food for him. Make sure they are small kibbles. And of course make sure he gets a vet check up and his puppy shots to keep him healthy. But yes it seems like the blue small breed puppy just isn’t aggreeing with him. Feeding canned isn’t bad either. It’s less prossessed than kibbled food and usually higher in meat content and will keep your puppy fuller longer.
If you insist on kibble, wellness core small breed, solid gold small breed, and nature’s variety puppy are good options to try. You can use canned food as a topper to make things more interesting for him. Make sure u start a teeth cleaning regime as well. Yorkies’ teeth tend to rot out of their heads no matter what you do but Getting him used to brushing them the sooner the better.