I did that!!! I hatched 4 of 6 and 2 of the 4 had issues at hatch but one survived and the cross beak did not
It was too severe.
ALWAYS, ALWAYS, ALWAYS QUARANTINE!!!!!! I do it for every bird I buy. After 3 to 4 weeks if no signs show up then you are good to. Slowly introduce them. I am a huge advocate to quarantine. You don't want to risk your flock for birds you just bought esp if you have been working hard for SOP.