Hello! I acquired 4 Rhode Island reds, around 6-8 months old. I was told they were rescue hens. I brought them home 5 days ago. Surprisingly, someone has laid an egg a day, but not sure which one as the spot has changed every day! 2 hens appear to be doing very well (eat frequently, walk around, approach me) The 2 others do not leave the coop and roosting spot very often. In fact, besides once or twice, I have never seen one particular hen leave the spot at all. Both of these hens look plump, do not appear to have any superficial issues (no gunky eyes, no loss of feathers or injuries). They sleep with their eyes closed, though they immediately open when I approach. And they make a purring sound. Should I be concerned? Thanks for your insight!