I have found the clicker method works great! Just start by noticing him in the down position, then click, and give a treat. Do this a number of times. Then when you click, treat, then say down.... He will eventually understand what it is you want him to do.... It sounds kind of confusing, but it really works well... I have taught mine to sit, down, and roll over, all within about a week... Just google it to try and find clicker training... good luck
