I have 2 French bulldogs. One is more of a problem child then the other but they both need to be trained. They are almost 2 years old & I need to get them dialed in. What is the best way to go about training them both? When we are working on something like \leave it\" or \"heel\" I take one into the garage and leave the other in the house but the one in the house will whine at the door. Distracting the one the I\'m working with. What tips do you have on training 2 dogs at once??"