I'm a newbie, I've only been at this a few weeks. I have enough knowledge to be seriously ticked at some strangers though. I just went to the P.O.. It was 1:30PM. There were chicks peeping in the back. LOUDLY. Postmistress has already called twice and the people say they 'will be down in a few hours'. It is Monday, it is a good bet these are MMM chicks. They were hatched late last week. Yes, they can go a couple days on their yolk but it is the end of that cushion. If you get chicks in the mail at least have the decency to pick them up asap instead of leaving them in a box all day at the PO. If you aren't available to pick them up then maybe picking them up at the feed store is a better option.