Hi everyone! We had all of our chickens killed by a fox in late May of this year, we got new chicks approx. the last week of May first week of June. These chickens have still not laid a single egg. We have done everything exactly the same as our last group, they laid extremely well. We are stumped! The only difference is we got these chickens about a month or two later than the last group (we got in April). It has gotten quite cold here, we are in North West Colorado but put a heater in right away and still nothing. It gets nice and warm during the day 60-70 degrees, and as low as 20 at night. Any advise? Thanks!