I wish we could let Chompsky romp in the garden, but the bunny plague is endemic in these parts, the birds would give him a heart attack, and foxes make regular appearances.
The only real positive of the new hay is it's shorter and he takes less out to scatter on the floor (to forage, presumably). Plus it does now look like he might be eating a bit more. Still not worth it. He has a sample box of timothy varieties on the way from another place - has grown up on meadow. May try your place as well.
He had his annual shot last week. As it happens, I'm currently in a vaccination centre parking lot waiting for Chomps's dietician to have her 3rd jab.