Depending of the age of Maggie, when we took Emma and Moco to training classes they told us that when they jump up turn away from them and ignore them (it never workede for us and personally i dont think it is a great way for them to learn but different thinkgs work on different dogs so i though i would mention it) we never had big problems with the pups chewing things but moco did at first, what we found is that he just needed mroe chewing toys, or toys that keep the dogs interest. We got moco his kong and a couple other toys and that solved it. We found with Emma that when they are about a 1 year, she went into a stage where she forgot her all of her training and wasnt resposive but after about a month she was bac to normal lol.