My EE is sick (see https://www.backyardchickens.com/forum/viewtopic.php?id=530128) and I think there's a good chance she won't make it. The vet is keeping her over the weekend to give her IV fluids. If she dies, this will be the third of my four original hens. I lost one at about six months (she was fine on Christmas morning and we found her dead in the coop that afternoon), another last October, and now the third is sick. The vet ruled out all the usual conditions/illnesses with the second one in a series of visits over a three-week period. The hen died on a weekend so I couldn't take her in for a necropsy. It's entirely possible that each one had a separate issue, but I'm trying to figure out if there could be something in our yard they're getting into that's poisoning them. Do chidkens know to instinctively stay away from bad stuff? A friend suggested black widow spiders but from what I've read here they aren't poisonous when ingested. Is it possible for a Black Widow to bite a chicken? What about mushrooms? I know we have Death Caps in our yard although I don't know if they are in season right now. I think they tend to be more of a winter phenomenon, and I've never seen one of my birds eating one but I just want to consider every possibility. We also have a few foxglove and delphinium plants but they are in an area where I've never seen the chickens loiter. Has anyone here ever definitively lost their bird to poisonous plants or insects?