I did try setting up a large pen with electric fence lines - seems to be working!
The lambs walked straight through (had it on low output anyway) and then came back in straight away and then spent the afternoon in the sun. Then they went back into their straw lined shed for the night, and weren't bothered wh3en I shut the door on them. My little ewe seems to like it there
She's munching with increasing appetite (unfortunately the outdoor pen doesn't have too much grass so still depending on me picking enough stuff for her). Still not much success with getting more than 100ml of top up milk into the lambs (between them) but they seem less hungry so maybe her milk yield has improved.
Need to figure out when she is well enough to let them all go.
Want to put her back with the rest of the flock on the big field with much better grass, but this probably means I have to bundle up in some way, as I don't think she will follow the bucket on her own without her flock mates (she is always last and more cautious/suspicious than the rest.)
While I can get hold of the lambs I wonder if I should take them for castration before they all go out on the field - will save me a lot of worry about catching them later. Lambs will be 3 weeks on Friday. (I have decided to let the vet do it this time, as I feel rather out of my depth with ringing tiny Soay bits for the first time - the learning curve has been steep enough already!)
Or would it not be a good time to get it done now, as I'm sure the lambs' system will have suffered too as a result of the mum being unwell. Maybe I should wait longer for everybody's strength to return? (I imagine taking her lambs away from her even for an hour or two will be rather stressful for her; we don't have a trailer so will need to make the vet trip with the car & dog crate.