Help! I had chickens in the past, but have been without a flock for a few years. I just bought 30 chicks, a variety of layers, to start a new flock. They arrived four days ago, and all was well until this morning when I found one dead and one looking listless. The listless one perked up with a bit of yogurt, so I bought some electrolyte/probiotic formula and added that to the water. This afternoon, however, the listless one died and another is sick. All three who have gotten sick are production reds (out of six reds in my total flock). Should I be thinking that there was something wrong with that batch of chicks? The others all look fine, though I become alarmed now anytime I see the others stand still too long, or not seem to react quickly. Is there anything more I should be doing? I've isolated the sick chick and changed the litter in the box of the others, though I had to use the same container.
The one that died this afternoon first got listless, though she would take a little food and water with prompting, then she lay down and her breathing became labored, then she had several spasms before she died. The chicks are on medicated starter feed, have fresh water each day, are in an interior room (not in the barn) with heat. Stools look normal, and no pasty butt.
Any advice is appreciated! I've raised chicks before and never had any problems, so am at a complete loss as to what to do.