Not only are broken bones painful, it causes a huge disruption in your dogs life, especially when its his leg that is broken. Think about it& dogs use their legs constantly. They use them to explore all over their environment, to run, to play, to dig, to scratch. When a dogs leg is broken, it can put a serious crimp in their lifestyle and activity levels. Sadly, a broken leg in dogs is actually fairly easy to do. A dogs leg can be somewhat fragile, all things considered.