My sun conure went through some crazy hormone changes that has lasted this past year! He just recently calmed the heck down and keeps them to a minimum! He was humping the paper lining at the bottom of his cage, regurgitating on everything I touched, crazy aggressive to my boyfriend, angsty ALL the time. He went to the vet several times to no avail in curbing his hormones. The vet went as far as calling us once a week to get an update on him! In the end, the solution ended up being giving him alone time in his daytime cage during the day without me there!