One other small thought. Nala has gotten up there in years, is pretty deaf, and going blind. She still walks pretty spry, and well, our neighborhood is flat, so on a brisk walk, she really doesn't show her age. I digress. I'm having problems with the communication part, calling her when she's off leash (like in the yard). I've been working with hand signals, but she has to be LOOKING at me. Doesn't do much good to do a hand signal to her behind. So I try to stay viligant that she's on her leash, and I'm attached to the other end when we're out of the yard.