he still drinks water, but throws it up, he has not pooped, is alert, yet seems very tired. i don't know what to do my heart is broken, and scared my other dogs are going to get sick? please if anyone has any ideas help, it is my nephews puppy he was so scared the dog would die he cried so hard he threw up his self, his pore little nose is like ice it was warm and dry, not anymore? i don't know what is wrong?