So my little guy goes outside on our grass to roam. Unfortunately he's so small it's a little tough for him to walk on it and he has to put a lot of effort into getting over the big grass. I was just wondering if him exerting himself so much to get over the grass is a good thing. I thought that if he is working really hard to walk around that maybe he's getting extra good exercise to make his little muscles grow. I don't know though. Any ideas?