My 2 cats have finally started playing! One is like 6, the other a kitten, and they're both good and friendly cats and were just taking time to warm up to each other. I heard growling and expected a fight, but saw them on the floor playfully tussling! they'd get up, chase each other, tussle a bit more... I had a royal bastard of a cat for the longest time, and am happy to finally have cats capable of being friends! Fingers crossed that they cuddle properly in the future.