I have 5 pullets, all about 16 or 17 wks. old. I notice when I let them out in the a.m. their combs/wattles are sometimes red and sometimes pink. The color changes from day to day. In the evening they can be as read as a beet, is this because of the heat? I've noticed this for about 2 weeks and I thought maybe they are getting close to laying but then the colors change. Anyone know what this means? Thanks.