I took him to the vet yesterday, he had his first fecal exam and the results were all negative - the vet said that he is in good condition and he will be getting his vaccines starting next week!
I have him on ScienceDiet (Any other recommendations would be helpful) and he enjoys eating it - I was surprised because everything I read said that Yorkipoo puppies can be really picky eaters once they are weaned off their mothers milk. So it's a good start!
I will be sure to ask more questions as they arise
Thank you all!