[17AndCounting]

I have some nice lush grass that I'd like to put my sheep on. It's got a few nettles mixed in but by and large it's just long and green. However I'm concerned that this will cause bloat. I seem to recall someone suggesting that they only be allowed in to graze for a little while until they get used to it.  Is that correct?  How long would you suggest?

[Hellybee]

And get some magnesium buckets in with them.  Too much lush grass can give them staggers/grass tetany and make them scour.  Mag will help combat this.  We don't tend to move them again here, once they're in they're in.

[waterbuffalofarmer]

You could strip graze the field, that way you would be able to insure they didn't get overloaded with lush grass and also you could control how much they eat too.
Hope this helps