Two Cats Being Cats

When a cat is not napping, there are only a few other things he is liable to do. He might eat some food. He might meow loudly for no reason. He might even lick his own foot! 

But if he does not feel like doing any of those things at the moment, there is a good chance he will find another cat and pick a fight. That is what happened here, when Jack decided to invade Dave's personal space whilst Dave napped. Dave wasn't working on any new napping strategies at the time, so he didn't much mind getting into a fight. 

Face Off

Generally speaking, few conflicts occur inside Dave's home. This has not prevented him from remaining alert at all times, or from developing a sophisticated system of defense readiness. It also has not prevented Dave and Jack from fighting with each other from time to time. 

Below you can see Dave and Jack engaged in a struggle for supremacy of the center of the rug. 

Fighter Dave

Usually he is pretty friendly, and while he sometimes accidentally pokes someone with his claws, he rarely does so on purpose. But Dave has been on edge lately. Back during his days growing up on the mean streets of Iowa, he always had to be on guard. Even in his quiet domestic life, he has retained some of his past disposition, always ready for a fight. Here, you can see Dave is biting Jack. Dave never does any real damage, but it is just one of the realities of living with Dave. 

In Dave's defense, Jack is usually being a jerkface when Dave decides to bite him. Jack, though much smaller than Dave, can still be a pesky guy. He might have been trying to steal Dave's napping location. In that case, Dave might have been perfectly justified in biting Jack. Naps are important.