i have a flock of 4, 2 of which are white star's, 1 a blue barred and a thought to be pure polish. my polish seem quite found of me when i go in the run she's the first to fly onto my arm but every time she does the other three fly up and knock her off. after i put her down the other's start pecking at her. they don't do it while i'm not there so why do they when i am. are they jealous.?