I have a flock of 6 chickens...1 buff, 2 Rhode Island reds, and 3 easter Eggers. They have been laying for a little less then a year, and just recently we have been having problems with their eggs.their shells are fine, and yolks are fairly thick(have ALWAYS been a little thin), but the yolks themselves have started sticking to the air pockets on the inside of the egg. So when we go to check them open the yolk is already busted. We tried hard boiling some to see what would happen, and not only were they extremely hard to peel, but the yolks are all to one side of the egg(where the air pocket is) and fully exposed. What is wrong with my chickens?!