I have ten laying hens right now, ranging in ages from one to four years. All of my eggs go to my mom, and lately she's been complaining about them tasting funny, like teflon. At first it started with just one, and I think, going by her description, I had figured out it came from either my full brahma hen or a half brahma, I can't remember. But she told me yesterday it seems like they're almost all getting that way, except for the tiny ones from my OEs or cochins. All of my standards but one are over the age of two, mostly over the age of three. I haven't changed their feed in over a year, so, what's causing this? Could it be their age? Because my OEs & cochins are only around a year old, and theirs are fine, so, age is the only thing I could think of. I really haven't done anything differently with them, so, I don't know what it could be. Anybody else have this happen?