Twin lamb disease is a creeper, if you don't know about it, it'll get you.
I remember Seppy, lovely Dorset Down ewe I had, 2nd lambing with me, going checking on them one November morning (so a month off from lambing) Sun was up, they were all lying down, chewing their cuds, she looked at me. Offered her a tic tac (used to carry them all the time) didn't want it, I didn't think much of it.
When I went back out a few hours later, she hadn't moved. I told mum and we went over in the tractor, noise of which didnt get her up. Drench, sugar lumps etc, no good, she died a few hours later. Mum asked me where she was when I checked her the night before I told her i thought the same place, it never even occurred to me (I'd only had sheep 18 months so still no idea etc)
2010 (could have been 2009) one or those winters when the whole country was frozen, Henrietta (a scrappy Manx X) went off into a corner to die (as they do) so I got her in, immediately and told her "not bloody likely!" and looked after her for the last month. She perked up (she wasn't roughing it In the snow!) and spat out 2 lovely boys (typical!), washed them, fed them, I don't know who cried the most 2 days later, them or me, when I found her dead in the pen!
Bloody sheep! They do say sheep try to find various ways to die!I
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I will also add, the saying "you can take a horse to water but you can't make it drink" also relates to ewes and licks.
Mine have had prelamber buckets and superlyx with fish AND liquid molasses. Unless Mary got their first, molasses were gone, ewes went head to head.
The prelamber buckets, they barely touched, though they did attack the superlyx. Just cos it's there, DON'T mean they'll take it.
I have now, put the prelamber buckets that they didnt finish, on the field, they are more keen on them now AFTER lambing than what they were before!