It's fascinating to me what the animals eat. I have learned a lot about their diets when I was denning, red fox are some of the dirtiest dens you will find. They bring all sorts of things back for the kits to eat and play with. I don't recall a red fox den that didn't have at least one snakes remains at it. they will have animal legs, birds, rodents and bones laying around them. I only remember one dirty coyote den she was a runted female and was only a yearling without a male helping her as I had killed him earlier during the breading season and she hadn't picked up another helper. Her tracks were close to the size of a red foxes tracks. I believe that she was a survivor of being orphaned by one of the guys that swore if he took the adults all of the pups would die too. Anyway, back to her den it was filthy and had all kinds of decaying animals and parts laying around when I saw it, I got a little confused because I was looking for a coyote den in the area where I had taken her that morning, she showed four pups. When I wired the first coyote pup out of the hole, I was surprised thinking that I had found a fox den in her area, as a bonus. Most of the bobcat dens I have seen were pretty clean, they seem to leave the dens pretty young and start traveling with mom. She will stash them, and hunt brings food back to where she left them. I had some M-44's set for coyote pups one year that had moved into a pasture. as I was checking them, I found my stake signs were gone. I found them all chewed up and laying some distance from my sets. Tracks and the bite marks told me it was bobcat kittens, latter I saw five smaller kittens sunning and playing just a few hundred yards away in a rock pile. Mice, birds, eggs, prairie dogs, snakes, frogs, lizard's, insects are all on the menu, as well as a lot of plants.