I don't know what is going on! I have heard on a lot of different forums that these symptoms are showing up! I have a friend in FL too and her dog had the same thing. Her is the link that she sent me and I guess this is what her dog has.
http://yorkieviews.com/hge.htm I'ts call HGE and it's a bacterial infection. It's worth reading and it's not too long. I've saved it in my favorites for reference...