Hi and welcome to yorkie Talk! Congratulations on your new baby. I wish I had found this forum before my baby came home. Our admin has put together a FAQ section and #13 deals with the question you posed. The direct link to the answer is below. This shpuld get you started and then I am sure you will have more questions we can help you with!! Just ask away! This is a terrific resource for a new yorkie owner.
http://yorkietalk.com/forums/showthr...3443#post63443