You should know,
Everything's bigger in Canada Sally!
Actually, despite being a weak attempt at macho humour, that is a true statement!
Pigs, sheep, beef cattle, Holstiens, Labrador dogs, cats, trucks, fields - I could go on...[please don't...]
If you really want to know I could give a long dissertation on why the market here wants big lambs, [or thinks that it does ] on the US sheep market, the Cinderella Canadian Sheep Industry, etc etc,but suffice to say, it really is another world over here.
Your post brought back memories...
When I lived back in England I had a Bedford TK sheep lorry with 3 decks. If a sheep joined me he saw the world. I never paid in some places, October, when the cows came in, to Candlemass, as long as the sheep didn't get out: RULE ONE, the dairy farmers were glad to have them.
As you say it is very good practise/husbandry to trim off the old grass that cattle have left behind, leaving a short sward that allows light and air into the grass making for a better start next year. Also it breaks up the worm patterns to some extent in both species, cattle and sheep.
The Golden Hoof. The light treading and the little prills of fertilizer! Aaah, what a salesman!
The snag is, at Candlemass [early February ] in SW England the grass starts growing again most years, and the sheep nip out the growing shoots. Bad news for the dairy farmer who then wants you gone .