Is it her first lambing?
We have had one very similar, a young first time ewe and her little ram lamb, we gave him feeds at the start every 2 hours and building upand would turn the ewe at some points (not everyone s ideal choice, but hey ho our eye is fundementally on the getting the lamb to suckle and get the taste for mums milk) This one ewe simply wont let lamb suckle at her side, but we/hes found that she totally happy if he goes through her legs to the milk bar and i think she was a bit cluelss as to wht this little bundle was at her side. He had his last bottle bight before last, his belly is felt to make sure hes feeding, and he doesnt call us really now when he hears us, but is happy to run up for a tickle
It ll take time, they may not take, but then again they may, just make sure you are supplementing his feeds. Use Lamblac bout 11 quid odd, for jsut over a bottle use 100g of lamblac to 500 ml of water and warm to tepid, or so it s nicely warm on your wrist
I hope he ll be ok. You can also get tonics to help them, if he still a bit flat.