I actually saw the tup lamb merrily tupping away, so knew the exact day and who he was on for definite... my vet had to phone the company to make sure what the protocol for sheep is, as they don't often do them. I have also seen him on an adult ewe (she was wagging her tail at him like goats do!), not sure if he was successful as there is quite a height difference between pure Shetland (tup) lamb and adult Gotland ewe with some texel in her..., but I have left her and hopefully not too many others, he was in for a couple of days.
Reason I got this ewe lamb injected, is that she is a nice grey katmoget and he is white, so not a good match... I am not so worried about the white ones anyway, I know who daddy will be... and can make sure Heptavac and some feed goes in at the right time...
A friend has had to have one of her female kids done, I think it was single injection, but not 100% sure. She definitely came back into season.... and was caught again by a very agile buckling that managed to jump out from somewhere he definitely shouldn't have...