Hi everyone, new here. I have a 16week old bullmastiff Bentley. I just stumbled across a link for this site so am excited to start having a look at everyones tricks and opinions. So far he knows sit, stand (still a lil dodgy), shake paw, down (or drop), crawl, rollover, leave it (snacks and dinner) and is learning stay which he does but being a puppy gets over it quickly. The next thing I want him to do is back up but at the moment when I try he just sits!