Im so sorry for your losses, I know what you must be feeling, I ordered 10 asst. silkies, and 3 buff seabrites and 3 silver seabrites from Ideal when I got them on friday, (shipped out on Weds) 12 were DOA all of the seabrites, and 6 of the silkies, since then I have lost 3 more silkies and have one remaining little buff silkies. she is starting to pep up but who knows, Ideal is going to send replacement chicks in April towards the end of the month, We decided to wait till the weather was much better before they send the tiny chicks,
Ideal was very understanding about the chicks not making it and was very helpful, I would bet the MPC would also be very nice about you requesting replacements too.
Good luck with the new chicks and with the rest of your little babies.