this is how i was taught: have Bacon in the sit command, then take a treat that you know he really likes, let him get a good whiff of it by bringing it close to his nose then as you say "down", slowly bring the treat downwards and hopefully Bacon will follow the treat laying down on his tummy. It took me a few times to do this for Tate to get the down right...he still pops up now and then as well but just don't give the treat to Bacon til he actually does lay down, even if it's just for a second. As more practice goes by, extend the time period to say 5-10 seconds that he stays in the down position. Good luck!!