[SallyintNorth]

IMO Shetlands and Castlemilks make the most wonderful crosses. But then I am biased as that is what my girls are

Pictures please!  (If you can.)  Are they all horned?  And all got mouflon (gulmoget) markings?

Have you considered a Charollais cross on them?  Not for their first lamb, of course, and maybe not until they're 2-shear either, but after that?  My feeling is the lambing would be fine - the Charollais are slippery and quite slender small things at birth, that grow and fill out fast! - but I am not sure about the actual tupping as the Charollais tups are huge.  Maybe would need to use a tup lamb.

From looking at the fleeces we got from our Charollais cross ewes here (from Texel-ish mums), the Charollais x CMxShetland could be a stupendous bit of fibre... 

[domsmith]

Our CMs have been crossed with everything.

Blue face, shetland, hampshire down, Ryeland and texel.

The texel lambs were great, if you want big lambs for selling. the shetland cross is good as a ewe so was the blue, got a great big mule. the coloured ryeland  are just crazy afro hair type lambs but huge!!

My last pedigree castlemilk died this summer.

good luck with them

d