Sorry to hear about the diarrhea.   

 Did Chachi eat anything different or injest anything you know of?  Man!!  Fasting for 48hours?  IMHO that's ridiculous.  Remember when Baby was vomiting?  I didn't fast her that long.  Maybe give Nutrical (as you're going to do) and a little rice or cottage cheese.  You know what I gave to Baby?  A little Pepto, and she stopped vomitting.  I only gave her a little because she wouldn't take it!!!  She hated it.  I just opened my Pet first aid book, and it talks about Diarrhea.  I'll post it on a new thread for everyone.