We are considering purchasing an agility set for our older GSD Jax. Jax thrives on praise and accomplishment. Right now he is using our GS's playset as his jungle gym/agility set. The set we are looking at includes a closed tunnel, an open tunnel, weave poles, a ring jump and a single bar jump. It's the single bar jump that DH takes exception with. He says that encouraging and praising Jax for jumping the single bar would be like telling him it's okay to jump the fence. I say Jax is certainly smart enough to know the diffence. Who's right? As a side note, in the house Jax has learned to bring us things we ask for (including sodas), pick up things I have dropped, and help me up when I fall (which is pretty often). To my mind there's nothing this dog can't learn if he sets his mind to it.