I noticed almost a week ago one of my chickens was lethargic and sounded congested . I separated her, and began to give tylan 50 with probiotics, electrolytes and vitamins. I also gave her vetrx. Well it spread to almost the rest of my chickens. Did the same for all of them. They are all back to feeling better, except for 2 of my girls. I’ve continued giving them this treatment but it doesn’t seem to working. They have watery poop. Want to sleep all day. I can pick one up and she will just immediately fall asleep while I’m holding her. They are eating and drinking very minimal. One is still laying. I checked there crop. One is completely empty, the other has a small like bump you can feel but it’s very small. I also felt for eggs and I don’t think they are egg bound. There is no lice or mites. I feel helpless not knowing how to get them feeling better. One just stands and sleeps, and the other just lays and sleeps the majority of the day. Any help would be greatly appreciated. Unfortunately as of right now we can’t afford to take them to the vet. They are golden comets, about 5-6 months old.