is an open mouth while sleeping a cause for concern?

[lurker9090]

never ever noticed chester sleeping like this. Today he chose a kinda new spot in his enclosure for sleepy time and had his bottom lip slightly open. looked silly and cute but should i be concerned? Or is he just super comfy.

(yes all glass enclosure, his doors are open almost 24/7 and we live in canada)
BTW his super pastel colours from months ago are gone now. must have been winter funk!
it was the first super hot day here.

 

[BleuSaphir]

Hmmm hard to say for me. I read their head should be facing up if they show signs of respiratory problems

 

[jamest0o0]

What’s the temperature of the cage? my initial feeling is that it’s not normal and does not mean he is super comfy.