OMGosh..I'd be so worried - until you get the Pro's on here to help ...here are 2 threads with some info - one is about The Fading Puppy Syndrome and I hope it helps you
http://www.yorkietalk.com/forums/showthread.php?t=25370 http://www.yorkietalk.com/forums/showthread.php?t=28400
GOOD LUCK !!
one more -
http://www.yorkietalk.com/forums/showthread.php?t=22980