I got 8 chicks in the mail yesterday from a somewhat local hatchery ( about 1.5 hours away) and initially they were all doing well. Last night one of the chicks got really weak on her feet started leaning over then fell over to her side. I would catch her on her back occasionally chirping but too weak to get up herself. I helped her up and did some of the things I found on this site to help weak chicks like sugar water etc. I called the hatchery about her and they told me to try feeding her a boiled egg. I offered it to her and she took it. I put her back to rest and when I would check her she would be weaker each time. She unfortunately passed lasted night. This has now occured with three other chicks as well. The hatchery is local and told me they will replace the dead chicks but I'm sick to my stomach. Half the chicks I got died. Any ideas what is going on?