Cats will not die if they eat crabs. When feeding the cat, be careful to peel off the crab shell and leave a small amount of crab meat to feed the cat. If the cat feels unwell, stop feeding immediately and induce vomiting to avoid danger to the cat's life. Some cats are allergic to seafood, and crabs may carry a large number of bacteria and parasites, so it is not recommended for cats to eat them.