I have ordered this line for my 9 weeks old Airedale Terrier bitch, since I have no fenced yard and it represents a good alternative to free run without a leash. You can play on a leash and romp. However, the line holding out not much snack. She has already chewed some points on the line and they are clearly damaged. As long as the line is therefore not met. In addition, it is really only suitable for small dogs or puppies, because I do not think they would really take a lot of weight.