Hi, I started my flock last year with 4 birds and had no issues whatsoever, they are all still healthy and happy. I felt ambitious and wanted to add a couple more. I got another 4 chicks of various breeds from my local Rural King and 3/4 chicks died within the first week. The first was a polish who seemed unhealthy from the get go. Then the two spitzhaubens health quickly deteriorated (pasty butt, stopped eating, lethargic). I did everything I could find to try to keep them alive- soaked their butts under a heat lamp so they wouldn’t get chilled and cleaned them up with q-tips, electrolyte water additives, feeding egg yolk, changed water twice a day. I got replacement chicks so the lone healthy survivor wouldn’t have to grow up alone but two of these chicks seem lethargic now. What could be causing this? I have a temperature sensor in the tank so I know it’s been approximately 90-95°f under the heat panel. Clean bedding, fresh electrolyte water, no mold in starter/grower feed. I live in Michigan so I wonder if they got chilled in shipping? Could this be some sort of virus? What can I do to help these chicks?