I am a relative newby myself and inherited Rhode Island Red chickens when we bought our new place. Mine are about 4 and I get one egg every other day. I used to have 7 hens but have lost 5 due to unknown reasons. I do believe if they are over-treated they lay less because they get full on treats...
I am relatively new at raising chickens. It's been trial by fire because when we bought the property less than 2 years ago, the previous owners left their small flock. It was my intention to get chickens, so I was ok with it, however I am learning as I go. I believe they are about 4 - 5 years...