ive noticed the past few days that 2 of my four poults seem to be yawning all the time (beak opens wide, neck stretches, beak closes) there is also a single pheasant chick in with them that is doing the same. also one poult always seems dozy, as if its asleep standing up. it will have its eyes closed, then if startled will open eyes and run off. do they sleep standing too? any idea if the yawning is an indicator of something? its been rather warm here the past few days and wonder weather it was heat related?