The dog is going to go with the one that gives it what it wants, not what it needs. Huge difference. Dogs live in the moment, they dont see the big picture down the road. They are only thinking about what they can eat or what they can hump... The dog doesnt know that when your teaching him to come to you no matter what, that it could save his life one day, he is thinking, "Wonder if he has food? Well I know that the other person in the house always gives me food or attention... Think I go see what they have"
I understand what you are trying to say here. I must be lucky though as for mine, the wife and kids feed them treats from time to time and all that. When it comes to hunting or running loose in the yard they can call them all they want. The only time they will listen good is if I call them. Could be the kind of dog I choose to hunt with though? They are more of a 1 person dog and I haven't had the problems suggested here. I guess they know who takes them out for the running as well as the hunting stuff. They enjoy hunting with me and that alone makes it great to hunt them..