My baby Jewel, has what the doctors believe is Necrotizing Encehpelitis or GME. You can read her story on this post:
http://www.yorkietalk.com/forums/sho...ht=necrotizing
Her updates are here if you are interested on reading on:
http://www.yorkietalk.com/forums/sho...ht=necrotizing
Your Abbie is too young to have symptoms from this so I would not think this is what she is suffering from. What Jewel has is very rare and cause is unknown.