Legally the bands have to go on before 7 days. If it appears they haven't dropped it could well be that they have been retracted because you are touching them, but are normally down. Sometimes you can get the testicles to drop by how you hold the lamb - under it's arms and facing away away from the operators body, legs dangling, works for us. It must be relaxed so if you can get it on quickly they haven't really noticed they've been picked up. If you press gently just above the scrotum that can sometimes help them to get into place too. Always have sharp scissors (swiss army knife) in case one is not in and you have to cut the band off - if that happens leave it til the following day to try again. Also avoid the teats which could get trapped within the ring. Your lambs should be quite big so their bits will also be big enough for ringing - Soays can be a big problem as by 7 days their testicles are still so tiny within the scrotum they slip back through the ring. Each breeder has to take their own decision as to what to do then. Mostly ringing doesn't hurt them, but sometimes they will lie down and look a bit uncomfortable for a few minutes, but we have never had one display acute pain (or we wouldn't do it). Our sheep are naturally short tailed so we don't ring tails, although we have in the past with Jacobs. One thing - don't ring anything if they are outdoors in wet muddy conditions as they could then get an infection via the site.