I have two parakeets(Jerry and Falco). They really like each other but they dont even try to have babies. I buy them nests but all they do is tear them up. Is there anything that I can do to encourage them. This might be a weird question, but is it at all possible that they dont know how to have babies? I know alot about keets, but when it comes to this subject I am stumpped on. Any advice will be greatly appreciated!