So I'm new to cockatiels. I have two. One my boyfriend brought me home last night. This morning I uncovered his cage and everything was knocked over and there was blood splattered everywhere. I took a look at him and all his flight feathers were ripped out. i don't know if there are any bones broken. He's not hand tame and is very aggressive and I'm trying not to upset him any more then needed. I'm am awaiting a ride to the vet now. I want to know if this was due from a night fright and if so what I can do to prevent them in the future.