Ferrets being carnivorous, I doubt they limit their diet to prairie dogs.
I’m sure that other wildlife is on the menu as well as CHICKENS.
Never seen it myself but I have read of ferrets wiping out an entire chicken coop but only consuming one bird.
I expect they’re hell on small dogs, puppies and cats as well.
Hopefully someone with more direct knowledge will jump in.
Any number of wild animals will get to pets or livestock.
That does not mean the answer is to wipe out the wild animals. It really is up to the owner to protect the pets or livestock.
My stepfather had a chicken ranch. Raccoons were the worst pest. They would climb up to the cages (which were about 3 feet off the ground), reach inside and pin a chicken to the bottom of the cage and chew off whatever they could reach. We would often find mangled chickens in the morning. They weren’t dead, just mangled and dying. Skunks and rats were problems, too.
My stepfather would put out traps for the raccoons. It is true that they will chew off a foot to get out of a trap. The way to prevent this is to get up before sunrise—they don’t become desperate until they see the sky lighten—and shoot them.
Raccoons are not endangered.