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Because it is a natural thing for a cat to do. Cats, even our pet cats, are perfectly capable of safely eating a mouse as that is what they have evolved to eat, amongst other small animals and birds. Such small animals are easy to hunt and catch, and due to the size of the prey, the bones are easy to crunch up.

Cats are strict carnivores and predators, and will eat everything of their prey. The organs of the prey are full of essential fatty acids (Taurine, for example) and other nutrients that a cat needs. Even bones provide the cat with calcium and are easily broken down and digested in the cat's stomach.

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14y ago

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