I've just started training my mother-in-law's five dogs. I thought we had 'sit' and 'down' down pat, but then I noticed something. I always train using hand signals as well as voice commands. A little bit ago I was working with one of the dogs, and I was fumbling with my treat bag, so I gave the voice command without the hand signal. No response. In fact, she looked at me like I was speaking a different language... I tried again, still no response. I used the hand signal, automatic 'sit'. I tried with the other two that were up at the time, and only one of them would sit on voice command without the hand signal. Is this normal? Do they just learn the hand signals faster then voice commands? Or am I doing something wrong?