Your cat is more likely to hunt for sport. Just because your cat is an indoor cat doesn’t mean it won’t get a chance to catch a mouse. This is why cats present dead mice to owners as a gift. They are dead, but she does kill them and won't eat them. They looked like they died peacefully. If a cat eats a mouse, it may become sick. Today it is much more common for people to keep their cats indoors full time. House cats do it mostly for fun. Simply stated, mice are an easy target. Cats eat whole mice. It is the cats nature to kill and eat mice. This explains why many cats participate in hunting behaviour but do not necessarily kill or consume the prey they catch, instead bringing it home and leaving it. I live in the countryside so there are loads of field mice around. Sadly, the little mouse may still be alive and twitching in the beginning, although it’ll be put to rest rather quickly. Cats do a lot of weird things. One of the biggies is eating grass, often to throw it up just a few minutes later. Some cats have zero interest in the hunt, especially if they’re well-fed and taken care of. I adore my cat but he keeps, like everyday, leaving me 'presents' of dead mice, but he just eats the head and leaves the body for me. Not all domestic cats eat their catch. For many years, many people kept cats or fed outdoor cats because our feline friends are so good at catching mice. My sister works for a vet and they caught one of the blood donor cats with a tail hanging out of his mouth & had to pry it out. For the same reason they catch/kill and if hungry eat mice. Much like birds, another favorite feline prey, mice are the perfect size for little paws and don't put up much of a fight. But our oldest cat is known to kill field rats and bring them inside out house!! Depending on the size of the mouse, your mischievous pal may eat pretty much the entire thing -- from head to toe. By David Shultz Aug. 8, 2019 , 1:45 PM. Why does my cat just eat the head of the mice? He always leaves it in the same spot as well. It's been a game of cat and mouse ever since. Yuck. Is this a sign of affection or just weird. My cats never ate them, just played with them and left them in front of the sofa at my feet. Why Cats Are Attracted to Mice. Cats like to prey on little moving objects. Why cats eat grass. Most cats are hardwired to enjoy hunting wild prey, but few domesticated house cats eat mice. These include toxoplasmosis and tularaemia. A: I would put a free-roaming cat at the top of your list of suspects. Two adult cats will hunt the mice and eat them. Rodents often carry diseases, parasites, and viruses. I've known cats to do the opposite, eating most of the body and leaving the head of the animal on the doorstep for people to find, so it isn't a universal thing. Cats are pouncers who love to stalk their target and wear them down. It's the predator instinct in them, to hunt. We have a "doggy" door so our animals to in and out whenever they want.