We tried to figure out what causes him to go wide. We thought maybe it was when he gets tired, but it's variable throughout the day. It definitely has to do with the way he collects himself between the 4th jump and the box. Also he hits the box too far to the left and isn't able to bend his body easily.
I'm still working on his striding into the box, but I'm focusing on improving his flexibility so he can bend more easily. I want to be able to practice his box turn without using the upright of a box prop to keep his head in. Most dogs with this problem only have a tight turn when the prop is in, so that doesn't really help fix the problem.
This week I've been doing wall work and experimenting with some agility jumping. He already knew some basics from his classes with Ben, so getting him around the jump was easy. I need to work on calling him sooner so he starts bending mid-jump and we plan to add some serpentine jumps for more bending skills. For the agility jumping I'm purposely working on both sides event hough he turns to the left. Please excuse my "agility handling" or lack of. I'm not an agility person!