Welcome to YT. That's a lot going on for such a little pup!!! I agree with Millie about the pepto. I also feed my doggie (almost 6 mos) Natural Balance but I'm wondering if 7 weeks is too young for this food. Aren't most pups this age still nursing? My breeder had Chewy on a puppy mash (kind of like cream of wheat) for a while and then he was on Royal Canin because their kibble is so small. I remember Chewy pooing a lot when he came home, but I don't know if it was 8 times per day

I would try to seek out some advice from Pat aka YorkieRose. She is always very knowledgeable and is usually the final word for most of us when it comes to yorkie advice. Good Luck.