I don't know about polish chicks but I will tell you this ... I received 2 recent batches of chicks from McMurray hatchery .. the first recent batch I received on May 23rd with 126 chicks (no doa) and May 31st with 27 chicks (1 doa) and I only had 1 die within the first day but that was because of the chicks piling. I have always ordered from McMurray and have never had a problem with sick chicks from them. In the last 2 orders I lost a total of 3 altogether.
I am sorry for your loss.
I am sorry for your loss.