My cats were all originally feral cats. I'm in Japan, so their tails could be the Japanese bob-tail gene, but I've heard it can be a sign of in-breeding too. So if he was a kitten from a feral colony this could be why he has a bent tail.I haven't the foggiest about his genealogy. He was found by the soda machine in my building, crying. A couple in the building said he's from a litter of strays that they had been feeding at midnight. If so, he's the best behaved stray I've ever met.
If you get them young enough they're often very well behaved.