Here's the background: I have 11 chickens, plus 2 more I got Monday. I don't quarantine, it's not worth the hassle for me and my small backyard flock. 3.5 days after we brought in the new birds I see one of my existing birds who is 25 weeks old and laying eggs for 3 weeks now, huddled in the middle of the yard, tail down, wings drooping, mouth open and breathing heavily. Cocci can't strike so early I don't think, Marek's is too soon of an incubation too plus I think this was one of my vaccinated chickens. She's absolutely miserable (I found her like that yesterday evening around 7pm). She could barely walk without falling over and when I brought her in for scrambled egg and water she kept face planting in her dishes. I had to syringe water into her all evening. She has more energy today and even laid an egg but she's still miserable. Droopy wings, labored breathing with mouth open, tail down, slow movements, and she won't eat all day today except a little moistened scratch; not even scrambled eggs though! She is still pooping a little bit but it's mostly yellow tinged water with some bits of black and green solids, and one almost solid brown poop. I've syringed water into her every hour all day and don't know how long I can do this; we're gone a lot tomorrow I don't think it was the new birds that caused this illness though, because I found out tonight after grilling DH that he sprayed poison all over a bee or wasp nest that was in the ground on the back half of our backyard. The girls were ranging out there yesterday for sure, they always do. Could this girl be exhibiting symptoms of being poisoned? Please help! If this sounds specific to an illness I'll try anything to save her (except vet; that's my one rule, I won't take a chicken to the vet) here at home; if it sounds like she was poisoned is there anything I can be doing to flush those toxic chemicals out of her? Thanks in advance for any replies and please don't flame me for not quarantining; that's not why I'm here. Thanks!!