Here is a thread wiht lots of info about coccidia on it.
http://www.yorkietalk.com/forums/sho...light=coccidia
Almost every puppy has the potential to develop coccidia and stress is a catalyst. It is not the fault of the breeder in most cases.
If she is not eating and want me to give you a recipe for syringe feeding zi eould be happy too. They usually lose their appetite with coccidia and you want to avoid dehydration and hypoglycemia with a tiny like Tia.
I had this experience with one of mine that I took home at 10 weeks which is why I delayed getting Chai until she was 15 weeks and Ava until she was 12. I like to let the breeder care for them until they are beyond that critical stage.
I hope she gets better soon.