What could have caused bubbah to die suddenly?
My loving bubbah
My four month old cockatiel was healthy and tame and loving. I had bought him from cockatiels breeders. He ate all the time and he even came if you called his name he would also give us kisses. Last night he fell asleep by one of those fluffy things they sell the keeps them warm from drafts that they could climb in. he would never get in it. But when I woke up this morning he is dead and laid out. What would cause him just to die like that?