I have been looking on youtube at tanks with Jack Dempsey's in. I have been given a Jd by a friend because it was getting harrassed in his tank. I wanted to check how they behaved in the tank because I wanted to make sure the one I had was ok movement wise. (he likes to hover around in one area, which looks fairly normal) However I was just clicking on the videos of JD's without really looking at the titles when I found myself watching a sickening clip of someone feeding a live mouse to a JD, not only completely cruel and unnecessary, but the damage to the mouth and throat of the fish that could be caused by the mouse biting and frantically scratching with its claws, not to mention the horrific cruel suffering inflicted on the mouse.