moEDIT; I saw your last post with
blood in poop. Sign of
metal poisoning or illness. In light if that what you describe can be
seizures!!!!! Also go with metal poisoning! Fluffed equals sick bird!!
Head bobbing can be regurgitation, also a sign of
metal poisoning. You must get your burd evaluated by an avain veterinarian. Metals poisoning can be treated, or if it is sick he can be treated. You will likely loose your bird if you do nothing
https://todaysveterinarypractice.com/lead-and-zinc-toxicity-in-birds/
https://vcahospitals.com/know-your-pet/lead-poisoning-in-birds
Below im leaving. For others . But you have a bird with signs of blood in stool. So I believe your symptoms are seizures!
" How do I know if my bird has lead poisoning?
The clinical signs include weakness (which can be profound), altered mentation, lack of appetite, paralysis of the legs, circling, tremors of the body and head, droopy posture, seizures, blindness, excessive thirst or droppings, regurgitation, weight loss, blood in the droppings, pale color of mucous membranes due to anemia and dark coloring to the droppings or excessively wet droppings. A veterinarian familiar with birds will start with a complete history, weight and a physical examination, and may evaluate the bird for crop stasis, which can be seen with lead poisoning."
How old is your GCC? They have a dive to learn to fly around weaning, and want to practice and beat those wings all the time.
It can also be that your bird is in to small a csge? They are more easily stresses and reactive if in a small cage. Or there us something causing thus, like achawk ir cat out tye window.
Being fluffed up is a big concern , that your bird could be sick. Burds hide and mask illness until they can't. When you see any symptoms the best course is to be checked out by an avain veterinarian.
Head bobbing can be a baby bird asking fir food. Or an adult bird asking for your attention. My Girl will do this if I make eye contact with her while in cage when she wants out and to be with me.
