So Blade my GSD isnt particularly food oriented. Hes very ho-hum about eating his meals and would rather be looking about than concentrating on me with the treats when training in areas with distractions. In normal situations, I can hand him food and he will take it very gently, even if I make him sit, down, shake etc to 'work' for it. But during an actual training session, at home, out and about, at club training, he snatches and knaws on my hand and constantly tries to grab the treats so he can then carry on looking about or doing whatever. If I ask him to do something, he does it and then is like 'right gime gime I'm actually busy' and chews on my hand. I have sore fingers and knuckles and wrists after training. I have tried with holding the treat, ie in a fist until he stops chewing my hand and just nudges and licks it. Sometimes he just doesnt even bother trying to lick though, thinking 'oh well, if I dont get the treat, then whatever, Im going over here...'. And even though I've tried being consistent and always with holding til he just licks for it, he still always starts with a big chomp. And when I with hold it - will the treat reward then be too late to have been a reinforcement for his work? What can I do?