My greys tree frog is always grey...he has a small lime green blob under each eye but the rest of him is never green.
He usually hides in a creeping ficus i have but there are two big pothos growing through out his cage. his cage is a 38 gallon reptaium that i have setup out side for my anoles....which are happy and never notice the frog.
he eats and soaks...is the cagenot green enough for him still?

