Constipated dragon?

It's been about a week since my dragon has pooped. He's about two years old; I adopted him about three months ago. He's kept on sand; which is controversial I know, but that's what the previous owner kept him on without any problems. He eats a green; kale, collards or mustards every day, which he seems to like very much. Occasionally I will put in some other type of veggie/fruit (from the approved list) with his greens but he rarely ever eats that. He gets dusted and gut loaded bugs (crickets) every other day or so, and a couple days a week I treat him to several superworms. He's in a 75 gal tank, with an appropriate temp gradient and hot spot. Any ideas? And is this a bit of an emergency, and should take him to the reptile vet? Thanks for any responses. ** I forgot to mention in original post: He is in the middle of a shed... This is my first dragon so I'm a little nutsy about his care.

What do you do for water?

Kale is actually not recommended as a daily staple, as it binds with calcium and makes it harder to absorb. How many supers does he get on those days. 5-6 is generally the most you want to give at a time, because even though they have less chitin than mealies, they can still cause blockages.

Can you feel a blockage in his belly, like a hard lump just before his hip bones? You can try 20 minute soaks in warm water (you'll have to change it out once or twice to keep it warm). I actually don't know a specific time frame of how long is too long for a beardie, but if you have a qualified herp vet in your area, I'd give them a call. And remember that just because a vet says they see reptiles, doesn't mean they know what they're doing. Ask how many reptiles they see in a typical week or month, and try to find someone who sees at least several a month. I once worked for an "exotics" vet, but in the 4 months I worked there, I think there was one rabbit and zero reptiles seen.

He gets free access to fresh water that is changed daily... And of course I had to post this question and within 24 hours he pooped a nice big poop just a couple minutes ago. Thank you very much for the advice; I will definitely keep it in mind.

Btw- it's totally normal for them slow down on their pooping schedule. Mine poops every 5-6 days and we theorize that he is in the 2-3 yr range.

Try soaking him in warm (not hot) water halfway up his body, that always gets them going.