At what point do chicks become a little more hardy?

[finnleyjo]

I am wondering if there is some age that if the chicks make it to it is more likely that they are going to survive and not get sick?

My chicks are 5 days old and doing great. But I am trying not too attached in case they don't all make it. Just wondering at what point I can start to relax.

 

[gritsar]

IMO, after the first week they should be over any stress from shipping and the chance for pasty butt gets less and less after the first few days.
If they are eating and drinking well, running around and being little hooligans it's time to start relaxing.