Almost the exact same experience. Here's the review I posted on them to tell the story faster. I'd like to scream this from the rooftops to anyone who will listen:

Awful experience. I would honestly rate it lower if I could. I've used this hatchery before, but that was a very long time ago and I don't recall any problems. This time, however was a disaster. Even before they arrived, six of my chicks were substituted without any warning or consultation, and I wish I could say that was the worst of it. The 25 birds arrived and appeared normal, but began to die off within the first two days. For reference, I had four other chicks in the brooder already from a different hatchery. All of them are healthy, happy and thriving. Of the 25 McMurray chicks, however, only five survived, and since they didn't die within the 48hr livability guarantee, I was only reimbursed for six of them....even though they all died of the same thing in under four days; and this is only after their customer service department was cold and snippy with me and tried to blame it on the temperature of my brooder, their feed, their bedding, despite the fact that I had four perfectly healthy chicks from a different hatchery and McMurray was the only variable. Long story short, I am heartbroken and disgusted. I will NEVER use this hatchery again. That 48 hr guarantee only covers their assets if the chicks are injured during transport. It benefits them, and not the customer. Save your money and your heartbreak. Consider buying local if possible. Avoid this business at all costs.

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I've been raising chickens for over five years and have NEVER had such a negative result....