I run my ewe hoggs, which aren't in lamb, with my in-lamb ewes.
As ewes lamb, they go from the lambing shed to a fresh field that hasn't had sheep on for months. As they go out, they are wormed, fluked, spot-on, feet and bums done. As I had one ewe lamb early, I gave two of the ewe hoggs their "makeover" at the same time as the lambed ewe and put the three of them, and the lamb, into the nursery field so Jinx wasn't on her own.
The other two ewe hoggs are with the in-lamb ewes and will stay there until the last one lambs, then all three will go to the nursery field.
The ewe hoggs seem to like the lambs and the lambs like the hoggs, so it seems to work OK.