My very first attempt at chicken keeping earlier this year was an order from Meyer. Due to a winter storm (it was February), they had to cancel all shipments for the hatch day in question, so I just canceled the whole order.
Then I decided to go the Ebay hatching eggs route, which had it's own set of stressors. Biggest being, again, USPS. Almost every one of my orders took multiple more days to be delivered than expected, and the very last one more than a week (not a single hatched chick on that one). Prior to getting one delivery from an instate seller, my hatch rate was a dismal 23%.
But, knock on wood, of all of the chicks that made it through the first day (two did not, assisted hatches, had to be euthanized). So bad hatch rate, very good survival rate.
Due to my mix and wanting more hens of certain types, I decided to go the chick route to fill in the gaps of my future flock. I picked up four Bielefelder chicks last Friday and by Sunday, two had passed. No warning on one (it was fine in the morning, dead in the afternoon) and I tried to save the one when I saw it was struggling Sunday morning.
Now, I am gun shy about chicks from other sources. I had 6 chicks ordered from Greenfire but decided to cancel after losing 50% of the local chicks I picked up.
Just my own experience.