So we've had this big fat gopher living under one of our sheds for years now and I always see it out and I think it's scared of the chickens, but recently I saw a smaller, darker, and sleeker animal come from that shed and go under the shed where the chickens are. At first I thought it must have been that gopher making a quick get away, since I was about ten feet away from it. But the other day I saw our gopher munching on some grass, while that other creature scurries past with a dead animal in it's mouth! So it's not that pesky gopher! And my sister saw it one time next to our shed and it hissed at her when she came near it. Can a gopher or a woodchuck kill an animal or hiss and is it a danger to my chickens? Is it a gopher or a woodchuck even? I think that those possibilities are highly doubtful. I'm thinking it's something worse like a fischer cat!

^^ This is what our fat gopher/woodchuck looks like and the animal looks nothing like that.

Whatever is what kinda looked like that fischer cat^^and ran like that but it was so low to the ground and the grass was so tall that I couldn't really see it's tail. I wish I could get a picture of it to be sure.
Could a fischer cat be a real danger to my chickens and does it do anything that the mystery creature did?

^^ This is what our fat gopher/woodchuck looks like and the animal looks nothing like that.
Whatever is what kinda looked like that fischer cat^^and ran like that but it was so low to the ground and the grass was so tall that I couldn't really see it's tail. I wish I could get a picture of it to be sure.
Could a fischer cat be a real danger to my chickens and does it do anything that the mystery creature did?