I had to go into a customers house when I worked for Brit. Gas, many years ago.
She had one of those nasty snappy tiny little brown apologies for being a dog rug rats, you know, the ones ALL blue rinsed oap overly self opinionated living alone and members of the wimmins institute and knitting / cake making club have. They nurse caress and kiss them all the time, and talk to them as though they are 3 year old kiddy winks.
It came snapping and yapping at me, and she said the usual. "oh, he won't bite you"
The little nasty 4 legged rat rug twat did though, right on me ankle. It wasn't big enough to bite anywhere else though, rancid rabid nasty little bastard it was.
As soon as the owner turned her back on me and went out of the room, I bloody well launched it courtesy of my boot right in the nuts.
It slithered off whimpering. Never saw it again.