yo man this might sound harsh but trust me.. Your beloved rat is in pain, you can't save him from where hes going.. What you need to do is take a chisel and hammer to the back of his neck and put him out of his misery. It may seem bad but trust me its the nicest thing you could do. you could also take hammer to skull or smash throw him as high as you can in the air. Another idea would be to put him on a busy freeway, these all sound bad i know, bud you need to consider your rat.