Please help!! I have had 3 babies die recently and a few other of my new chicks are acting strange. There are approx. 30 all together, half are from mcmurray hatchery and the rest were incubated at home. The first one died about 2 weeks ago, one day i noticed it was acting lethargic, separated it from the others, took it inside and by a day later it was dead. It was the only one to act at all out of the ordinary so i figured it was an isolated case. Then about a week ago i moved the rest of the chicks to an outdoor pen, (they were in brooder indoors) The pen is next to my adult flock and both pens are attached to the coop, which has an area sectioned off for the small chicks. Two days ago i let them out in the morning, all of them seemed fine. I went back out maybe 2 hours later and found one laying there dead. It was the same type as the one that died before (leghorn). Still all the other chicks seemed fine, until later that day when i noticed several of the others sort of standing around lethargically, eyes closed, wings sort of drooping. They were easy to pick up and seemed to have no energy, dont seem to be eating. Then this morning i found another one dead, again it was the same kind although the others that have been acting weird are different breeds ( polish, silkies, sultans) The majority of the sick ones are from McMurray and came with the cocc. vaccine. I havent seen any strange feces or anything else out of the ordinary. It has been hotter this week (75-80) then before but they have had shade and water. Please help i am so worried. Ive given them an antibiotic and wormer in the water and the only other thing i can think of that may have had an effect was that i had given them layer crumble for a few days since i was out of the chick feed. thanks!!