I have kitties and yes for some reason dogs thing poop is a delicacy.
I agree I would bring a stool sample to the vet to make sure.
Hello and Welcome to YT. "Yorkies For Dummies" and"Yorkshire Terriers: A Smart Owners Guide" are excellent resource books .Another book "How to Housebreak Your Dog in 7 Days" Is very helpful. They are not as easy to housebreak.
Congrats