Sally, you say yours won't produce milk unless on grass - have you got grass growing then, cos we haven't really, even with the hot weather previous to this snow. I'm hoping for grass on turnout but that could be two or three weeks away yet and they'll have been on hard feed and hay in the meantime. A breed thing - Swales and mules insist on grass?
I think I said they won't milk
fully indoors - they'll give some milk, of course, but if you need them in full milk, eg, to rear triplets, we find they need to be on grass.
Yes we have a bit of growth here - our grass will grow if we get about 10 degrees C, especially if we get some sun, and extra especially if the ground isn't completely dry. We've had a few days like that (as well as 24 hours of bleak midwinter!) in the last fortnight. We have several fields well rested over winter ready for the spring lambs; we move the mothers into the lusher fields as they lamb, keeping the stocking levels very low until the grass really gets going.
2010 was a different story - we had a really cold spring and hardly any grass until mid-May. Practically no-one raised triplets successfully that year - just one Leicester, I think.
I don't know how milky a Shetland is, but since many people (including BH's cousin) say they can comfortably lamb and rear Texel cross twins, I guess they are pretty milky. And I assume that pure Shetland lambs will be less demanding than Texel crosses, being smaller and slower-growing. So hopefully you'll be okay!