Quoted from Guoke.com To put it simply, generally not.
Rumors say that cats begin to eat their owners’ bodies soon after they die, making it difficult to obtain evidence, while dogs will wait a day or two before doing so when they are really hungry. Do you still remember the way your cat squatted on the TV opposite and looked at you? That's to see if you stop breathing.
Guoke.com Rumor Encyclopedia Answer:
Both cats and dogs, there are cases of eating the bodies of their owners after their deaths, but this is only done as a last resort.
Argument
First of all, it is true that cats eat the bodies of their dead owners, but this is not a "patent" for cats. Here are a few examples.
Cats occasionally eat their dead companions or even their own kittens
As a carnivore, the discussion on the diet should be: What do cats generally eat? The answers can be divided into four types: living animals; raw meat; cooked meat; carrion.
Obviously, cats are not very taboo on these four types. Except for the special method of death, the dead owner is usually either dead raw meat or dead carrion, which is within the range of the cat's diet.
Think more deeply about whether cats can eat the same kind of food (because it is more in line with the logic of cats to treat the owner as a kindred spirit than as an owner). Although I have not seen relevant reports, it seems that cats will not eat living or corpses of the same kind unless they have no choice, because the corpses of dead wild cats generally seem to be relatively complete.
The situation is more complicated when female cats are in estrus, pregnant and lactating. Possibly due to hormone levels, male cats attack female cats with kittens. After being attacked, a female cat will sometimes eat her kittens. It is said that this will make the attacker think that all the kittens are dead, so as to save the other kittens. My friend once delivered a litter of wild cats. The mother cat ate all the placenta, afterbirth, and a kitten that died just after birth, using it to replenish nutrition and physical strength.
Do cats eat human corpses?
So do cats eat mammals that are larger than themselves?
In fact, cats in the wild generally do not take the initiative to attack large omnivorous/carnivorous mammals that are very different from their own size when hunting, but I tend to think that the reason is that they cannot beat them rather than not wanting to eat them. Cats have no advantage over large carnivores in terms of strength. Even cats (lions and tigers) generally keep a distance from animals with big fangs. Cats are more open-minded when hunting. Just forget it if you can't beat them. There is no need to risk your life just to eat.
Cats are not very interested in storing food. Although when food is scarce, some cats will bury the small animals they catch. But when conditions permit, they prefer to catch and eat now.
Cats are not picky eaters when they are very hungry. But as long as there is a glimmer of tolerance, cats will not eat things they don’t want to eat or are not used to eating. In addition, domestic cats have a bad habit compared to cats. They are all gangster-level violent individuals. When they see moving animals smaller than themselves, they can't help but pounce on them and bite them. However, they give others a chance and then walk away happily wagging their tails. I have observed that many domestic cats who have no worries about food and clothing regard pouncing and biting small animals as a game, and in the end they will say thank you for participating.
Cats are generally animals with better table manners and show considerable respect for their food. Specifically, in natural environments, cats generally like to kill food before eating it. If the food still moves, they will usually play with it out of curiosity before eating it again. So don’t worry about your cat suddenly rushing up and grabbing a piece of your meat. If it does, well, don't worry, it won't start eating until you're mostly unconscious.
About dogs
But is this common? In 2001, Hawk, editor of Straight Dope, a famous American newspaper Q&A column, answered this question.
He quoted a forensic pathologist at the 1992 meeting of the American Society of Forensic Medicine in New Orleans as saying:
"...In my personal experience, dogs will starve for many days before they begin to eat the body of their owner. The cat will only wait a day or two."
This certainly does not mean that the dog would rather starve to death than eat the meat. There are many precedents for dogs eating their owners