Anybody with experience shipping week old-2 week old chicks?

[b2c2chicks]

Ive shipped day olds dozens of times. I have seen people online claiming to have shipped week-2 week old chicks. Is this possible?

I ask because I’m counting eggs. Let’s say to fulfill an order for 7...but only 5 hatch...yet I have several 4 day old chicks that would be around a week old by ship time. Would I safely be able to add a few of the older ones to the box? (Providing I put gro gel, feed, and fruit in the box also)

 

[Brahma Chicken5000]

I know some hatcheries ship 4-6 week old started pullets and cockerels. I would be nervous about sending day old chicks with week old chicks though.