I think this is a good illustration of the right way to train a cat. In dog training, negative reinforcement is used as much as positive. In cat training, you must use a lot more positive reinforcement than negative, cats are so wilful that "just saying no" doesn't work with them. Bo used to growl at me when I clipped her nails, but when I started to brush her after the clipping, she purred throughout the entire procedure. She just loves to be brushed.