Georgiemama, here is a good link. I gurantee you, You don't want it, this it is a real pain to deal with and worst to cure.
Your dog/puppy can die so be careful. Get the baby to the vet right away, it may not be coccidia.........could be something else, but just the same find out.
COCCIDIA: A cause of diarrhea in dogs/puppies