Reply #2: The office cat where I worked picked up a bad habit of biting

[yellerpup]

I managed a performing arts school for kids and the cat would attack either the kids, or me, willy-nilly, usually without provocation. Seems the poor fellow had a bad toothache and gum disease that was making him crazy. He changed instantly once his medical problems were tended and the pain was gone. Purring can be a sign of pain in cats -- a queen will purr the whole time she is giving birth to her litter. Have that kitty vet checked asap. :hi: