Mine don't normally come into heat their first fall/winter.
Blood could mean an infection or parisites. Have a look under the eyelid for colour to see if they have any other health stressors.
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If you have a vet or a microscope, it might be worth doing a fecal count to see if there's anything nasty in there. The only time I had symptoms like that in a lamb that age was with cocci. They had just moved from another farm and the stress of the move caused a flair up. (and I'm still bitter about the first vet saying there was no treatment, put it down - there is treatment and the ewe lived a lovely life). Bloody poo was the first symptom, but it very quickly went downhill in 24 hours. So if it's not failing fast, it's probably not cocci.