Mine have a mixture of backgrounds. Some have been part of a large rescue action from a horrible situation or were rescue born to newly rescued pregnant sows. Quite a few are no longer wanted kid's pets. Several middle to older age sows have been widowed and failed to integrate with the residential rescue herd, one youngster was orphaned. A couple arrived as an emergency after an unexpected acrimonious relationship break-up of a forum friend and another couple lost their human mummy, another friend, to cancer. One of my neutered boars was a bully and failed to bond with any boar he was introduced to either by his previous loving mummy, who didn't want him to stay alone but had maxed out, or at the rescue. And one my current lot was born here as a total surprise (mum didn't show); her dad turned out to be a supposedly safe over 5 weeks post neutering op rescue boar who spent a couple of days on the lawn with the rescue herd to get rid of some initial overexcitement prior to rehoming.