I have had my BTS for a while now and have noticed his belly is a reddish color even after shedding. I put a thermostat in his cage to control the temps and i changed his bedding from cypress to aspen because i felt cypress was too rough on him. Could the red just be stained from the dark cypress color or is red just normal in BTS's? And he has a slight whistle. I know sneezing and heavy breathing are common and wheezing is bad, but i am not sure what to make of this in-between noise. Any thoughts?