Hey. I've got two cockatiels, a male and female. I bought two of them but male died and i bought another one like a week ago. I have a sleeping issue with him. At night female one comfortably sleeps, with head tucked between feathers but male is not sleeping at all. I've never seen him napping during daytime and he don't even sleep at night. As i recently bought them so currently i'm not taking them out of the cage but they are active during daytime and sometimes chirps as well. So i'm guessing he gets tired but he still refuse to sleep. Is it anything to worry about or what? Kindly guide me as i'm relatively new with birds.