A percentage of blues will have problems .
Some are fine full coats no health issues.
I think a good deal depends on how blue they are do they have brown or tan markings with white chests and maybe a few feet, are they all blue or do they have blue with tan markings?
Chocolates can have sparce hair and health risks also, so just not the blue babies.
You did not try to breed for this I pray for the best outcome possible for these babes.
