It might be worth trying a different pellet like oxbow adult. Those kaytee pellets have a lot of additional ingredients that oxbow doesn't have, and one of those ingredients might be what's causing the cecotrope problems. It might just be easier to start him on the adult pellets so you don't have to mess with having to transition him off of the juvenile to the adult. Plus the adult pellet doesn't have alfalfa in it in case that's what's causing the problems.
Finding a pellet that he can tolerate might also calm him down some. He might just be really hungry and that's what's causing some of these behaviors. Baby buns grow really fast and they need a lot of food to keep up with the growth. It's hard for them to be getting enough food by just eating grass hay because it's lower in nutrients and takes longer to eat. Pellets are more condensed and nutrient rich, so it fills them up faster.
Finding a pellet that he can tolerate might also calm him down some. He might just be really hungry and that's what's causing some of these behaviors. Baby buns grow really fast and they need a lot of food to keep up with the growth. It's hard for them to be getting enough food by just eating grass hay because it's lower in nutrients and takes longer to eat. Pellets are more condensed and nutrient rich, so it fills them up faster.