I have a very friendly parakeet who loves to play with other birds I occasionally "bird sit." I know he'd just have a ball with a tub full of chicks and is very gentle. But I wonder if diseases are a problem? Do chicks carry things that could hurt or kill the parakeet? Is it just during the first weeks that I need to be careful (a kind of quarantine period to make sure nobody is sick, or is it a perpetual danger? Would it take direct "beak to beak" contact or could I carry it on my hands/clothes? Also, if any of you have let this kind of keet/chick contact occur, do the chicks ever turn on the keet when they get bigger?