Hello all !! BACKROUND My mom and I are new to the world of chickens and have had my small flock for only about a year. We raised 7 little chicks from the local feed store, and all but one made it just fine to adulthood, except for a poopy bottom or two. We only lost one at about three months of age caused by a laceration in her throat. We did everything we could, but unfortunately she didn't make it. Everything was going pretty well after that, aside from just minor things, like one ameracauna having some slight gleet problems (seemed worse in the morning and better later in the day). our other seeming a bit sniffly, and their combs were not quite as bright as they could be. (WARNING; description of chicken death>) And then in February of this year, we had a random death, she was one of the healthiest of the four, and one morning we found her laying in the coop instead of out free ranging. She wasn't in the box part, and she had already laid her egg that day, so we knew thats not what she was doing. After about an hour she was having trouble keeping her eyes open, an hour after that she couldn't really keep her head up, and then about an hour or two after that, as we were on our way to the vet with her, she put her head back like she was going to try to cough or sneeze, but instead seized and thrashed violently, after about 45 seconds she was gone. We took her anyway to see if we could get a cause of death, and the vet said he didn't see any signs of anything that could have been wrong, and we couldn't afford an autopsy. The only evidence I have, is that her crop seemed extremely full and hard, especially for not being the end of the day. We had recently started giving them more of a scratch food then a pellet type food. Impacted crop maybe? I have also read about random death syndrome in chickens. After her death, for weeks after the rest of the small flock of three would take turns calling out to her, pretty much all day. And unfortunately now, our wyandotte, who pecked her way to 2nd in command, picks on the american, Penelope, who used to be Beta. I can tell Penelope is constantly stressed from her bullying and I'm looking to rehome the diva hen. NOW Since the death of our fourth chicken, our flock of three has not been doing too well. Their respiratory was getting pretty bad, altho it has gotten better since I have been putting fresh herbs in the coop and putting garlic and apple cider vinegar in their water. Penelope, the one with constant slight vent fleet has gotten worse, luckily not super bad, (I have seen some pretty bad pictures on the web)but also our gold-laced wyandotte is having the same but slightly different issue. Its not quite like Penelope has, its more just droppings getting very stuck and hard under the vent, and she used to be VERY fluffy. But my biggest concern is after checking the bone under their crops, I noticed they are very underweight, and occasionally I see them sitting to rest somewhere. I used to never see this, the only time they wouldn't be walking around and\or pecking would be if they were dirt bathing or sun bathing, but this is neither. I only noticed this a couple days ago, and have been trying to figure out whats going on. One of them is scary skinny, just skin and bones and feathers. I'm very scared she might leave us soon. I have been looking all over the internet for answers. At first I thought it might be mites. But I have been checking both the chickens and the coop, day and night, and I have found nothing moving or scurrying (I have pretty good eyesight, as I can spot spider mites on plants, and and I used a flashlight at night) . I only found small, round/oval white things in the feathers on their backends, which I thought might be worm eggs? So I thought it might be worms, maybe grape worms? As they free range most of the day, just about everyday, and they have not been wormed. The symptoms seemed to fit. Symptoms extremely skinny/thin respiratory issues glee and dirty bottoms small round, oval white balls in feathers by vent diarrhea, wet stools pale comb less energy But today I took in some dropping to the animals hospital for a fecal diagnostic, unfortunately when the vet called with the results, he hadn't found anything. He only said they might have some coccidiosis but even if so it wasn't evident in the droppings. Other then those symptoms they seem to eat and forage normally. They all lay very well. One lays slightly less then the others, only maybe one less a week then the other two, but hers are much bigger. And the oldest, who is only about a month older then the other two, lays quite small eggs, only slightly bigger then when she first started laying. but she is also the thinest, and has always been on the thin, 'lean' side. Please let me know if you have any advice, or have any ideas on what you think is going on. Thank you ! A very worried hen mother Can add pictures if it will help !