Cats will eat hamsters. If a cat is not fed properly and is often hungry, it may hunt on its own and develop an interest in hamsters, which could lead to it eating hamsters.
In addition, cats are very playful. Even though many domestic cats no longer need to hunt for food, they might still play with hamsters to death. Therefore, if you keep hamsters and cats together, be careful not to let the hamsters out of their cages. If you notice the cat scratching at the hamster cage, scold and stop it immediately.
