One of my herdwick ladies decided she didn't like the look of our tup last year and instead took herself down the road to visit the local texel
Her lamb was beautiful, and infact was just a larger, meatier herdwick in appearance. Can't comment on the meat quality as she isn't with us now. She'd lambed once before, and needed no assistance with the texel x
Herdwicks (in my experience) are NOT easy sheep to keep if you need to do anything with them. Obviously depends if you buy ones that have been left alone on the fells all their life, but they don't like being rounded up, hate being brought inside, will easily jump 5+ feet... Our ewes are always a lot harder work than the tups too, not sure why really.
That said, they dont ask a lot of you. Beside wormer, shearing, a zinc lick and heptavac, ours get nothing additional all year. Last winter (which wasn't too bad) 50+ girls ate less than three small bales of hay between the lot.