Oh now that has reminded me that you can use pessaries in sheep too, although probably too late for your ewe to need them. Years ago (in 2000 I think) we had a Gotland ewe who had triplets but one was long-dead before she lambed, so pretty messy inside as you can imagine. The vet gave us Synulox 500mg tablets - great big things meant as pills for calves - to insert as pessaries. They were used in addition to the antiBs. Sometimes if the ewe has been through a lot of internal manipulation, she might also need steroids - we used them a couple of years ago in a first time lamber Soay who had an enORMous single lamb which came head only and was of course totally stuck - only my hands were small enough to get in there, but I had big bruises from the tight squeeze, so obviously she did too, and she kept trying to push for a few days after she had lambed, a sign of continuing pain and tissue damage. The steroids settled that.