It was a bit concerning when one of the presenters said the clipfitters sometimes came off, and it didn't seem a very inclusive trial, only 88 lambs?
Yes it was a small trial, but there seemed to be pretty clear differences.
On the clips coming off, that was only on the largest of the older lambs, where the testes were by now pretty huge.
She said her pragmatic take was, if they're too big to clip at this stage, they'll be away entire soon enough for there to be no problem, so don't clip them. And anything with smaller testes at that stage, the clips seemed to work fine, so they could be castrated at that stage.
But I think they'd need to do more, bigger and longer term studies to see whether any of the clips fell off before the testes were fully disintegrated, so that you might get functional tups in lambs that has been castrated that way.
I'm still not convinced, maybe I've been lucky, I ring at 3 days and i've only seen 1 tup lamb show any discomfort, and he was up and running with his mum within 30 mins. (not many sheep here, so I watch them), also I only castrate the males and tail the females, so I can see what they are at a glance.
I hadn't realised until watching this that it is now established that there are longer term effects of castration by rubber rings, many of which cause longer term pain. And that the pain which last for hours or days can create longer term effects on lambs if the castration is done very young. So that there is actually an argument that it's better to castrate
later than 7 days, as the impact of the assault to the tissues is more readily overcome at a later stage. Since it seems now inarguable that there is considerable pain whatever stage rings are used, the direction of travel seems to be that if rings are used then anaesthesia and analgesia
must also be used, whatever age the lamb is, and so if that becomes the case then ringing lambs at less than 24 hours for sure and possibly up to 7 days will probably be outlawed, as there is no benefit to the younger ringing, and considerable downside.
Sorry, this is probably a bit garbled. I'd like to write a really considered summary because it was full of information and perspective that was new to me, but sadly I won't have time just at the moment.