Yeah, it might sound kinda weird. My keets sumtimes do that. They sorta shake like a dog to an their feathers spread and they look twice their size! Their so cute when they do that, but im not sure if it means anything. does it mean they are hungry? or sick??
They do this often times when they are cold or wish to sleep. What they do is they let air around into the place between their feathers and skin and so there is a warm protective bubble of air surrounding them.
that's normal don't worry.it's only when the stay fluffed up for a long period of time that something maybe wrong.then you would check to nose and the eyes or the nostrils are watery looking take you keet to the vet at once.
when you wish upon a star,you pray you wish comes true.