Rabits love to chew on branches. I always wrap the trunks for the first 2 or 3 years, and then they have always left them alone. I have horses, and I feed good alfalfa, so there is always lots for them to eat, plus the horses always drop some feed on the ground that they can scavage. They just like to eat that bark it seems. I've never tried to graft before, but I will give it a try to see if I can salvage it. They took the bark off right down to the ground though, so I'm going to have to go very low for the botton of the graft. A couple of years ago we had lots of coyotes around, and the rabbits disappeared. I saw a fox here the other evening trying to get into the duck's pen, but I scared him away. Wish he would have scared the rabbits away.