So hard to really guess from that information... Have you made sure there is no obstruction? is he defecating normally? Is it possible the heat has dropped or humidity increased and the Uro has gotten a respiratory infection? If there is labored breathing involved I think I would be very tempted to take a visit to the vet. A picture and some details might help us.
Keep us posted and good luck!
Elizabeth
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1.0 Mali Uro Archimedes (May he rest in peace)
0.0.1 Egyptian Uro Zuberi Mosca Khu (Mosca)
0.0 Fish
0.1 Sulcata Minnie
1.1 Iguanas Flik and Loki
0.1 Newfoundland Jasmine (RIP)
0.1 Feline Winter
Indiana & Wisconsin