Instead of clicking, you could get a dog whistle to make a marking sound for the behavior you want. You could also do a thumbs-up or something in conjunction in case you don't have the whistle. I've always done hand signals with the cue for sit, down, stay, wait, etc...
Sit: I turn my palm up. I make it more animated if the surroundings are distracting.
Down: Turn the palm down and angle my hand toward the ground.
Stay: Palm facing outward, fingers oriented up. If I'm stressing it, I'll push out at the same time.
Wait: Palm facing outward, fingers oriented down. (I twist to the outside so I don't break my wrist.)
I heard somewhere that Shelties only need to be lured into position 8 times before they "have it"... can't remember the source.
Judy and Barbara also suggested I get a single tone whistle. I meant to get it yesterday when I was out and I forgot. I need it because my yard is pretty big and if Cooper goes to the far corner he cannot hear me, so I can't get his attention.


I've actually taken all seven of mine on a walk at one time... with just me. LOL!!! It was a little interesting... 