My new chicks have recently started to gasp (sometimes), shake their head rapidly, and one of them seems to sleep a lot and not eat as much as the others. Apparently, they shake their heads and gasp when they have gapeworms, but my chicks are only a week and a half old, so it’s not very likely. It could be aspergillosis, but that doesn’t explain the rapid head shaking (they haven’t done that before, at least not this many times in one day). Which one seems more likely, and how do I treat it?