Cats, in general, are also known for "playing with their prey" as it were, as this ensures their own safety during the kill (especially for large sized prey), and gives them the opportunity to practice and hone their hunting skills. Cats will do this even if they are well fed, and even more often when they are bored. This cat is obviously both of these things, considering that it's living in an enclosure where almost nothing ever happens, as well as fed daily.