No wolves,cougars or coyotes over here. My sheep (flock averaging about 100) are largely tough hill sheep (Beulah Speckled Face)who live on our rather poor fields (1,000 ft above sea level) and maintain a good body condition on the poor pasture. My neighbour has 1,000 of the breed hefted to the mountains behind us which only ever come down for drenching and lambing ....they do very well......but no large predators.
We have our share of 'brokers',too, but it doesn't seem to affect their nutritional status as young as 5-6. My oldest ewe (aged about 12) has a pretty 'broken mouth', but still manages to have body condition score 5 having produced 26 lambs in her long life (with triplets this year).
Having been to a slaughter house, the stunning process does NOT always work optimally and not all animals are oblivious to having their throats cut.
With 100 sheep, a large flock of chickens, dogs, cats, a scattered family and 40 acres to maintain, I don't have the time treat them all as pampered pets even if I want to.
NO I don't run an ovine mega farm....but this is BACK YARD Herds.