i have lost 3 chickens over the last 6 weeks. One every 2 weeks. Now I have another sick chicken. I did not observe any symptoms in the other 3. This one , a Delaware, has had diarrhea, is lethargic and has stiff legs - especially the left leg. As of this morning her poop is firm but has some pink (blood maybe?) in it. Her chest is very bony. She is eating well though. I have wormed all the hens twice (via water) in the last 3 weeks, and am providing electrolytes and vitamins in water. Any ideas? I don't want them to suffer. And of course I don't want to lose anymore. Thanks.