My experience with my Belle, who was 8weeks old when we started leash trainning, is the old standard "link leash" no cloth or material leash, My vet sales a brank of leash and collars and if your dogs chews throug, no question asked, you return it and replaced on the spot….It has worked so far, I will check out tomorrow of the brand I don't remember but the collars are great....I will let you know. Check out my album and see my husband and the 3 B's on the first walk together after the new fosters came.....
H