I used an early March-born NCC ram lamb to breed a handful of ewes in late September. He settled all of his ewes right away. I put raddle marker on him instead of a harness, but I wasn't concerned about any of the fleeces, figuring I'd just compost those. I was more concerned about getting the ewes bred. I kept that group on the best feed I had, and made sure the little guy didn't loose too much condition. At a year old now, he's massive. I did turn them in with an older ram after two cycles, just in case.
I got my start in sheep when a late-born ram lamb (probably May) snuck through & bred a bunch of ewe lambs in October. These were Katahdin & Dorper crosses.
*Grass-Fed Lamb & Pastured Poultry*