Goat Whisperer
Herd Master
If you don't, you have a much higher chance of something like enterotoxemia to rear its ugly head. It's very nasty and not uncommon. Saw quite a few cases of it last year.
I agree with limited pasture. Lush fresh green can easily bloat them.Let them out for like an hour at first, then lengthen the amount of time they're out there. @Baymule wrote about putting her sheep in fresh new pasture and that's what she did. They'll love it, if you introduce it slowly.