OK
So mine had their fleece coats on for 24 hours, and I just took them off to brush them. Their hair was all static, but when I brushed them out, no tangles.
So I'm going to make them more of the fleece coats and keep them dressed all wnter.
I bought fabric in lots of colors and prints. see my other thread
http://www.yorkietalk.com/forums/showthread.php?t=58707