Dear Bella,
Don't worry. It is best to wait on yorkies to be older. They do have a risk of getting hypoclycemia if they leave too early. How old will he be when you pick him up now? With the ears - the breeder probably just wants to make sure they are up when you pick him up. But they can go up and down afterwards - while he is teething. If you want his ears to stay up better, just keep the ears trimed. Rhposody yorkies has a great web site on how to do this. She also has great information on puppy care too. I love her site. I also like Shooters page site too - great for yorkie lovers. Well, best of luck with your new baby. Time will pass quickly and soon you will have him home.