That's quite sad, but if they weren't in good condition there is not much you can do with this cold weather just now. I have a 12 year old ewe, she is in with the lambs as I really do not want her to see the tup again (she would if she could!), and check every morning if she is still there, so far so good she is doing ok. She is a shetland, tough as old boots. No teeth left - and she loves toast. I can hand feed her with no danger of getting my fingers crunched too!
If my lambs wouldn't eat their haylage within half an hour I will take it away again (and give to the ones that eat it), mine have it in feeders and I do throw a bit onto clean snow - all is gone very soon. It is strange I never taught them about hay, so don't know why yours wouldn't pick it up. I did feed concnetrate to the lambs and ewes right after they were born, as we did not have good grass until the end of April, so they learnt to trough feed early on. I think I had a hayfeeder in there too, but can't remember.