I was given 6 hens about 2 mths ago. One lays regularly and another now and then, I think. I don't know how old they are, but am beginning to think maybe they are getting too old to lay. At first I thought It would take time for them to get familiar with the different coop and it was also wintery and cold, but now it's warming up and days are longer, and they seem settled here. I let them out sometime and they know where to go back in, have plenty of laying pellets, water and occasional treats and veggie scraps. Is there some way to know if a chicken is old just by looking at them? Any signs to look for? They won't tell me their age.