So my baby does this randomly. Typically more towards evening time but I know they can get uris and they can open the mouth for the regulation of the body temp and im not 100% sure.. she doesn't have difficulty breathing that i can see, it's honestly like she zones out entirely and her eating habits and what not havent changed all that much, no black beard or any signs of discomfort (i know that doesnt always mean much, theyre good at hiding illness) Could it be because it's hot in her cave?