Hi folks! My six ISA Browns were laying six eggs a day for weeks. So much so that we had to give eggs away. Now I'm lucky to get two to four eggs a day (two today). I don't see any evidence of predators, broken shells anywhere, or anything out of the ordinary. They aren't molting and they have a constant supply of food and water. Have my ladies unionized and are on strike? Any help/info would be appreciated!