that's an idea, hadn't thought about that. Might have to invest in a lure machine.
only problem with the ferreting without nets idea is that on both of my permissions the warrens are mainly in cover, so the rabbits don't usually bolt into open fields.
A lure machine may be worth looking into
you could walk along the hedge row beating the bush or even get someone with a terrier that could go into the bush and flush the rabbits out to your dog