For at least two weeks, maybe longer, one of my black hens has laid a humongous soft-shelled egg, one about every three or four days. I thought it would eventually fix itself, but the problem must be getting worse. Anne just brought in today's egg (broken) and the indoor-outdoor carpet from the nest so she could clean it. After reading a post yesterday about a hen's having to be put down because of something similar, I'm getting worried. When I say it's a soft shell, I mean that it's nothing more than a very large, clear membrane with an egg inside. The membrane is covered with a flaky, muddy looking substance that can be washed off the EXTRA large membrane. Is this common and almost always ends with whole eggs being laid? Should I wait longer or get her to a vet right away?