yorkies are the only single coated breed. they need a coat in cold weather. after trying many my favorite is fido fleece. worth every penny. easy on and off with velcro. they wash well. and keep their underbelly warm and dry.
http://fidofleece.com/category.cfm?C...TOKEN=59003983
our second fav is from drfosters a value at under $8.
http://www.drsfostersmith.com/Produc...01+2033+113065