I have 13 chickens (2 are Roos). We added new chicks to the flock back in May, and the birds were laying earlier in the summer. My oldest birds are 4.5 years old. For the past 4 weeks we've maybe gotten 5 eggs. Is it the heat? Still stressed from the additions? Getting too old? Any ideas what I can do to help them start laying again? Even when they were laying back in the summer it wasn't a lot. Maybe 5 eggs a week. They had slowed down before we added the new birds.