Holes in my fruit cage netting

This year I put up a fruit cage around a couple of fruit trees and the raspberries. The fruit trees are against a brick wall with the raspberries in front of them. The netting is therefore, on three sides. I am finding huge holes in the netting and as fast as I sew up the gaps more reappear. I suspect a family of mice that may be living under the wall. I am wondering if anyone else has experienced this problem and what solutions may be suggested. Thank you