I don't know what's happening!! My chickens have all been healthy til now. A few months ago noticed one of my rir girls acting lethargic. She got really bad...gave her some vitamins/electrolytes ...she pulled threw although she hasn't laid an egg in a couple months and still doesn't act completely right. Well about a month ago found a dead chicken in the coop. Wasn't sure what happened...wasn't that concerned at first. Then a couple days ago found another dead chicken....then this morning another!! Noticed my rooster is walking funny....very slow..wobbly. The others seem fine right now. What is killing them so fast??? What do I need to do? I'm so confused!