O.K., so, recently I got 18 new ready to lay pullets from a reputable hatchery, one that we have gotten good pullets and chicks from for 7 years. After the first week, I was getting about 12-14 eggs a day, fairly good for new pullets. About 1 1/2 weeks later, I'm only getting 5 eggs a day, and this has been going on for the last 2-3 weeks. They have plenty water and feed, their house and coop are quite large, the house is decently clean, and they have no mites or lice. For the last month or so however, there has been a little bit of a rat infestation in the shed behind it, but I am catching a lot of rats, so there cannot be too many more. The rats could be stealing a couple eggs, but not 10. The hens seem quite healthy and are in with 1 rooster. Could the rats be stressing the hens out? Or could they have spread some disease? I have never had any drops of laying like this before, though we always get our new hens around this time. The feed and water are also quite clean, and they are getting layer ration.