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[wood_nymph]

my bearded dragon has lately been having very irregular poo. he went almost 3 days without pooing them left a pile of poo on the end of day three. that was 2 days ago and no poo since. he's been eating his woodies as normal acting normally and isn't slugish at all, but being a juvenile i'm just a tad concerned. he's not bedded on sand so it can't be an impaction from that, but can the exoskelaton from the roaches impact? temps are 40 at the hot end and betwene 20 and 25 on the cool end he's been spending most of his day in the middle in a potted plant.
any ideas?