If your dog is paralyzed near its hind legs, you will need to learn how to express a dog’s bladder. To do this, you will need to locate their bladder and put one hand on each side. You will then need to firmly press your hands together, collapsing the bladder of your paralyzed dog. You might notice that the tail raises and the hind legs lift. Next, your paralyzed dog should start urinating. The video below will help provide a better visual.