Agreed. That's why culling the adult Narris before the poults hatch is not a good plan to prevent the poults from getting infected. Any shared environment can allow for transmission, even weeks to months after the infected occupants have left.
I will be contacting them tomorrow early morning or afternoon. I have a busy day tomorrow. I will see what they recommend. If they want to do the PCRs I may just take the one female who exhibited symptoms instead of both birds.