My chicks are being shipped April 14, and it's still REALLY cold here. I know the boxes are sized for 25, 50, or 100 chicks. Right now I have an order of 25, but I'd like to add a few more. However- if that means the hatchery would increase the box size to the 50-count size, might that be worse for their survival (less chicks in a bigger space)? I'd rather do what's best for them. Anyone ship chicks and have any input into this? Thanks!