quaker parakeets

Hello, I have a 4 year old Quaker parrot and he bites everyone except for me. He constantly attacks my little sister and I don't know how to stop him. Sometimes he would be nice to her but most of the time he just bites her and the bites are quite severe. It's been an ongoing issue since the...

My quaker rather suddenly developed several behavioral issues last week which had me concerned about a health issue. The most concerning of them was that she wasn't defecating much even though she seemed to be eating normally. Other behaviors had me worried it was a hormonal issue, so my first...