Davis and Parker show how rough normal cat play behavior can be. These cats are NOT fighting. When cats play they are practicing their killing blows on each other. It can look scary, but you must take into account their relationship, body language, and the ability to spar and diffuse without malicious intent.
normal cat play
This is NORMAL cat play! This is NOT aggression. Note how mutual it is, no growling, no hissing, though that can also be normal and both keep coming back for more! Cats play rough and this is good and appropriate. They need to do this to each other and not to human hands and feet. […]