That's a healthy looking dragon! Nice colors to.

Young bearded dragons tend to eat more insects than veggies. As they get older that will be the other way around. Looking at your pics I suggest you chop-up those greens in to smaller bits as to not risk him not being able to swallow properly. And you may also want to offer him more of a variety. Try adding different kinds of greens, vegetables, and occasionally fruit and making sure everything is chopped big enough for him to eat well. Just my !