I was told to expect a 10% loss in ordered hatchery chicks, but these weren't shipped but picked up at a locat feed store and drive delivered from the farm. I think you could expect to loose more with shipped chicks because it seems to me that it would be more stressful.
The remaining 3 will be 1 week old tomorrow and are active and healthy. The company is mailing me replacements for the ones that died, but I am really nervous for them. I hope these ones arrive in good health. I am worried since there will be fewer in the box, so wishing them good luck.