watery

Fawn is 3 weeks old . We have had her 2 weeks. Today having watery yellow poop. All water running down leg. Just started. Called breeder where she came from he's been having same issue for couple days. He doesn't know what it is. No access to vet care on Sunday. What can I give her. Was on red...

Ok y'all need your help once again. I have a fawn with watery poop. She is 2 weeks and 2I days old. She is eating the same but lays around a little more. What can I give and how much?? Any other advice is helpful!