Is the Yucca Palm tree poisonous to parakeets?

My parakeet just unexpectedly died and I have no idea. I have a Yucca palm tree right next to her cage and I was thinking that maybe she ate some and it was poisonous. Another posibility was that she got sick from the mineral stone and shell for the beak (which we bought at a pet store). It could have also been a disease, but if you know what it was please tell me! here are her symptoms: she was puffed up in a ball all day, she didn’t talk at all, she always flew to the ground and she didn’t fly to the high places she used to fly to, and she wouldn’t leave her cage, I had a very hard time getting her out. Please tell me because it hurts more not knowing than it would to know. Thank you.

How do I take care of my parakeet? How do I befriend it in the quickest way? How do I get it to trust me?

I have two parakeets, one named Chidori one named Chidoryuu. Sept. 20th 2007 was the day I took them home. Ane here, I thought I’d be having a great time with them on the first day, polaying, screaming together, and annoying my mother (teehee) and so on. But they don’t even trust me! They yell at me everytime I try to get my hand into the cage. I tried everything, putting food in my palm, whistling until my throat went dry, everything. But they won’t let me approach them. I really want to become friends with Chidori-chan and Chidoryuu-kun, but how? Can you guys help me out?????
- iRock!!