Hi,
Welcome, you should be able to feel your puppies ribs but not see them. Yorkies come in all shapes and sizes so I would speak to your Vet to see what they say about the weight. I am attaching a link for you in regards to dog food. Diamond is not a very good food. As far as feeding amounts and times goes each food has there own recommendation
as to how much. Most puppies do however get fed 3 times a day. Good Luck, and once again Welcome look around there is some great advice on this site.
Dog Food Reviews - Main Index - Powered by ReviewPost