Hi all. I have a chick who is four days old. It has been hopping around and loving life until this morning. Now, it literally falls asleep while standing up, whistles while it is breathing while sleeping (almost like a snore), and does nothing but sleep. I have tried to get it to drink and eat but it just wants to sleep. Any idea what this may be and what I can do to help it? I've moved it into it's own brooder just in case it's a spreadable thing. Thanks!