My male cocktail who getting quite old now(21) has started whistling and chirping at night and drinking a LOT of water which is kind of concerning, normally he sleeps just fine covered ,with a small night light on and also has a little drink before bed .He is also acting as if he is gasping for air after drinking almost like he’s choking and he randomly will do this throughout the day. Should this gasping , weird sleep and over water drinking be a concern?