If you try this please look up the proper amount of weight for your dog to carry, every breed/size/dog is different. Recently I came across a video about how weighted backpacks for anxious/reactive dogs can sometimes improve their focus, reduce their anxiety, and slow them down on walks. Let me start by saying this did not cure my dog's anxiety/reactivity overnight, HOWEVER, there was a dramatic difference in just the first walk with the weighted backpack. Not only did it give my pup a better workout, but he wasn't 0-60 in a millisecond when we saw another dog, instead he saw them looked a little alarmed but then looked back at me and even though it is a small step, it gave me enough time to create more space away from the trigger so that he didn't react. A few weeks in now and we can pass dogs without crossing the street or having to take my dog off the trail, I know it won't work for everyone but wow this has been a great tool for my dog. He is also WAY more tired at the end of the walks and is finally getting enough exercise.