One of the 6 week old ACD puppies I'm fostering is deaf. I didn't know at first, and I was having so much trouble adding verbal cues and getting him to respond to my voice. So I did some tests when he was sleeping... definitely deaf or at least very close to deaf (I went from clapping to eventually banging two pots over his head... no reaction). Mostly, it has not slowed down his learning... in fact, he is the quicker learner of the two puppies. So, any creative ideas for a marker signal? Right now I use a thumbs up, but that only works when he's looking at me. I tap his back too, but that only works when he's close to me (and it's not as easy to do as it sounds).... so one idea I have is little squirt gun! Like the kind you get from the dollar store. That would have obvious drawbacks though, lol... Is there such thing as an "air gun"? Something that would shoot tuffs of air at him? That'd be cool. Any one have any other ideas or know of a technique? What other training considerations should I have when prepping the pup for a new home/prepping a home for the new pup? I was thinking I should focus on reinforcing frequent eye contact and "checking in" when he's off playing by himself... what else?? OOH! I just had an idea... getting him to target a laser light would be helpful, wouldn't it? Thanks for the idea guys!