My second attempt on a smooth cat walking animation works a bit better, but the neck and head still seem a bit stiff, though. It is really kind of tricky to animate four legged animals convincingly.
I thought back some 15 years ago when I watched "Felidae", a german animation feature film, which became one of my favorites. The actors are mostly cats and the film is quite cruel and serious, not for kids, really. They must have been really hard working on all these cats and did a good job.
The second four legged walk I tried was a horse gallop.
This was my first approach on a 4 legged walk animation. The cat looks like it has just been crawling out of the refridgerator :D