We too have a sennie, and when we first got him he couldn't stand the lady's husband, nor myself which is said seeing my wife bought him for me. took him about a 2 wks to get used to my wife n kids, and took a month b4 he'd even step up for me. now he's my lil buddy. i clean his cage, give him food and water, treats, install new perchs (when needed), and can even use the hose attachment from vaccuum in and around his cage without so much as a squawk outta him. But before we got him he'd bite an attack the other hubby if he was too close to his wife on the couch so they sold him to us. She good luck to us, but Zuzu did a full 360, he stays on my shoulder or dances hand to hand for me, whispers in my ear, licks my neck, even peeps n flaps his wings to let me know needs to go back to cage to do his duty then does a loud screech to say done and whoever can pick him back up. The only time he is nasty is if i wear a ballcap, then he'll scream, bite, hiss, growl and is pretty much upset with me, so i believe its all how he was brought up, take the hat off do a couple clicks and noises to him and he's back to lovey dovey for me.