Everyones has given you sound advice. I would assure you give a "puppy food" right now. A lamb and rice one works well for us. (until you go to your vet) puppy food has a higher protien for the little ones. We are lucky in that the yorkies really eat such a small amount in comparison to the large breeds. Much easier to get the higher quality pet food. A broad specturm wormer and up to date on shots are the basics. Your vet can check for worms and direct you on the type of wormer you will need to use. Your vet will be able to check more thouroughly for any special health concerns also.
Enjoy your new furbaby!
WELCOME TO YORKIE TALK!!!