Hi! Months ago, in April, my mom got a couple of cockatiels, one female and one male. Because I was abroad at that time, and my mom has a phobia of wings, the birds didn't adapt well to their surroundings. They basically spent 3 weeks inside the cage, until I got home. 1 week after getting home, so the birds would be used to my presence, I opened the cage and tried to feed them out of my hand. Moon, the female one, quickly got used to it, while Sun, the male, didn't get outside the cage. (Now here comes the important part.) Last month, Moon died. I was abroad at that time, again. To make Sun feel less alone, I tried befriending him, with no success. Sun acts normally but if someone gets near him, starts moving from side to side and chirping very loudly (and sometimes flaps his wings). What should I do? Should I let him stay this way? Should I try to befriend him? Should I give it to someone who has cockatiels? I can't get another cockatiel, but I don't want him to feel alone.