Yes and no. Since pigs do not, unlike sheep and goats, have to have tags or identity until they are moved, and can be moved on a temporary Mark such as an orange dot, the situation is different. In the past I have bought tagged weaners, and untagged weaners (who moved on a temporary Mark). I understand that I could take the tagged pigs to the abbatior on that original tag but as it happened one lost their tag so it was easier to slap mark both of them for simplicity on the movemeets form with my slap mark. The abbatior was fine with this, so it seems is the e pig movement. The piglets that arrive with a temporary Mark always go to the abbatior with my slap Mark, not the breeders identity. Since these non breeding stock always go to the abbatior within the year the scenario you suggest of multiple owners is unlikely.