Hey, I believe a occasional wheeze can occur when the animal is stressed and or is exerting itself beyond normal limits. However if you are hearing it every 2nd or 3rd day that sounds suspicious to me! You should first bump up your temps all around the enclosure and monitor those temps closely. A slight increase in the temps will boost the reptiles immune system. Try to switch from cocohusk to either all aspen or cypress mulch. Cocohusk I believe can be irritating to the respiratory tract. If the wheezing persists you may need to have the reptile examined by a vet! Good luck. Stay in peace and not pieces. A.C.