What will a chicken NOT eat?

After many years of spending time and money re-erecting fence and covering aforesaid with preservative, (notwithstanding amounts spent hiring son only to find he'd conned his grandmother into doing it for him), and have it scaled by chooks who take the concept of being free range too far, I have taken the plunge and have ordered a living model. To wit, one hedge.

Nice lady at end of telephone tells me hedge needs to be kept separate from chickens for at least a year, or chickens will get fat and hedge will disappear.

Ironically type of hedge ordered is 'edible', i.e. will be covered in berries, squirrels etc in autumn.

So... apart from planting electrified barbed wire or hiring a slobbering hound with a machine gun, is there anything which will grow like the clappers and act as a barrier between it and my brand new baby hedge?

Or is it back to B&Q?

plant the hedge using tree spirals and canes this will protect the hedging from anything and helps promote quick upright growth.

you can guarantee whatever you don't want them to eat they will want to 

Easy question....Mushrooms!  Mine wont touch mushrooms and I have no idea why?

Can you get a mushroom hedge?

LOL Probably not but maybe plant some along the ground under the hedge?  Maybe put them off a bit?

Problem solved, why didn't you give all your chickens to your friends at Christmas with a packet of Paxo. Then plant a hedge, pack your bags and go on a round the world cruise.On returning home buy some day old chicks and start again.Then if the hedge does get eaten, it would have been an enjoyable rest from the critters.