I just picked up 6 guinea keets from a local hatchery. I was told they are 3 weeks old. I've been home for an hour and they've been sitting in the brooder with their mouths open. I can see their tongues(?) wiggling as they breathe heavily through their mouths. I have not noticed any of them drinking or eating. Are they just stressed and need time to acclimate or should I be concerned that they might be sick?