Hiya, sorry for the delayed response !
If they've not got BKKPS tags on it's highly unlikely they've been registered. Even if they'd been birth notified (before 40 days old) they're too old now to register as pedigree pigs unfortunately - the BKKPS don't allow registrations for pigs older than 18 months.
What that means for you is that you won't be able to sell any of the offspring as pedigree Kunekunes - it comes back to the "without the paperwork, it's just a pig" situation unfortunately. It won't make any difference if you're raising them for pork, but if you'd hoped to sell breeding stock it effectively scuppers your plans
It's such a shame there are so many pigs that haven't been birth notified and registered because the bloodlines aren't huge and every one not registered/birth notified is 'lost' from the potential breeding pool (and this is true for all pigs, not just Kunekune) it's why the BKKPS keep the costs of membership and registrations low, so as not to discourage people from pedigree breeding. Sorry, this isn't aimed at you directly, it's just a general observation and makes me so
because there are so many people who are disappointed when they find out they've been sold what they thought was a pedigree pig when it's not AND the registered herd numbers across all breeds are falling, if people were registering piglets the rare breeds might not be in the dire straits that they are
(sorry ! It's my soap box subject
I'll get back in my box now
)
Sorry to be the bearer of bad news, but if there's anything else I can help you with just give me a shout