Bridge-grafting and inarching is used to repair trees that have been girdled by mice, rabbits, other rodents or by mechanical injury. Bridge-grafting consists of connecting the cambium layers above and below the girdled area. This process restores the flow of carbohydrates from the leaves down to the roots, thereby allowing the tree to continue its normal life processes. The connection or bridge is usually made with scions. However, uninjured suckers growing from the base of the tree may be inarched or young trees can be planted near the base of the tree and inarched. Trees normally grafted in this manner are apples, pears, walnuts and cherries.