We have a 10 month old puppy who is very good at picking up new things, he very quickly and eagerly learned to sit, give paw, catch etc. He would learn these things within 10/15 mins of teaching. However a few weeks ago when trying to get him to lie down he did it a few times and then its as if he decided that he didn't want to do it any more and now whenever we try anything new he runs off frightened and hides. He has never been mistreated when learning new things only praised and treated! Anyone any tips on how we can change this and encourage him to learn new things??