Generally the hedges they don't eat are the ones that they shouldn't and so not suitable to be used for hedging.
Laurel is definately poisonous - maybe the green shoots aren't so bad.
Clydesdale eats ANYTHING!! I have had to hot wire all around my paddock as property owner is a tree fiend - we have them everywhere and Serenity thinks he's planted them for her benefit. Electric fencing was cheaper than replacing the trees.