Help, I dont know what to do with my green cheek conure
I bought a green cheek conure who was really friendly when I first got him. He let us pick him up and hold him, but recently, he became very mean. He attacks us when we approach his cage, we can't even open his door, or take his trays out to feed him.
He flies off his cage anytime we leave the house, so when we come home he's usually walking around on the floor. When I pick him up, he jumps on my finger and climbs on my shoulder, but as soon as he gets up he starts biting me. I need help, what's wrong with him? How can I get my nice bird back?