Rick, Labs are my favorite dog, their great. I don't know if the blood in very young fawns is coccidia for sure but I have tried it on week old fawns as I thought the blood would be from coccidia and they stopped. Panacur is a great wormer and I have used it on bottle fawns before to worm them. You just can't overdose on Panacur, doses at ten times the right amount have caused no problem in other animals. When I found out the dog breeders were using it for coccidia I figured it would work on fawns and it has. I figured with the Resistance to other drugs coccidia was building it wouldn't hurt to try another product that was working for other animals.