our lizard is two years old, and lately, his appetite has decreased, though we have heard that it was normal for their appetite to slow down as he gets older. Though we started to get concerned when his poop came out strange at first it was normal poop but then it started to sort of mold it grew fuzzy, then earlier this week when he pooped it came out sort of in a sack-like it had a covering, then it molded again. That is all that has happened so far, please if you know wants wrong, please help us we don't have any reptile clinics near us so we have to know wants wrong before we try to go somewhere.
I agree, it is odd for the poo to have a growth even if left for days. For now though it would be best to remove it right away. It wouldn't hurt to do a deep cleaning of your entire enclosure. I doubt it is something wrong with your dragon, more likely something wrong with the environment.
Do you have a picture of the poo? If not, try to get a picture next time.
And one of your enclosure too.