Ranger now recognizes the human sign for water but he hasn't made any effort to make the K9 sign. It's interesting how quickly he caught on that brushing my left hand against my cheek twice meant water. Our philosophy in teaching sign language has been to use the signs in everyday context. When hiking and running on the beach he gets thirsty. I'll sign water and then produce the water bottle. At first he would sit politely once he saw the bottle. Now he sits politely as soon as I sign water. Next step is to teach him to make the sign for water.