Hey my name is Rigo and i'm new, today I went to the coop like all day and noticed that 3 of my hens,were dead and one of my last batch of chicks did too., I got 55 chickens left and about 12 chickens .i tried them for ticks, worms, mites and noting they keep dying and i don't know what to do i let them free range and at night and the coop is lock top and bottom and my baby chick's they are dying too no mark's on there buddy's they just keep dying .What should I do? Any idea what disease this could be? Any ideas to cure this? Please help! Thanks!