I have 3 dogs and they're all adults that are kinda trained. They're just reactive to especially to doors being open with keys, doorbells, dogs barking in the neighborhood and the sound of the garage being opened (not all of them but one of them more so than the other two, especially since she is quite the anxious dog.) During walks it's ok most of the time not really pulling much, but when they see people far away or other dogs they either growl or bark (more so at other dogs they see in passing). We have an idea of what we need to do like positive reinforcement, positive association (with specific people, etc.). One of the dogs has no teeth so he needs some soft treats and we know we need a clicker to help as a training tool. I'm just looking for some tips on how to train them because I know we can't train and have their attention at all times and we have to look for opportunities instead to treat them, when behaving and whatnot. Any tips will help thanks, especially treat recommendations for training and training tips in general.