Thank you dietcoke - that's a great help. Just to be sure, I've emailed the manufacturer just in case theirs is different to the one you use. Hopefully the little piggies can get cracking on scoffing all the new lush grass soon!
My piggies won't be out on the lawn any time soon (clay soil like a marsh at the moment) .
When we've used treatment (in the pre-guinea days) the directions about composting have been after the 2nd cut.
So by the time you get the piggies grazing it should be cut a couple of times.
We rely on the 'natural' fertiliser that the hogs deposit. And they scalp the lawn but skillfully leave the buttercups so our lawn looks rough . I get out with a trowel to dig them up when I have time.
BTW - go easy on the lush grass . Limit their grazing to an hour at most on the first couple of times, they can get bloat (which can be fatal) if they gorge. Ignore their pleading little popping eyes
And you can start them off my cutting grass to stuff their faces , before they start going out. Counting down the days here !