Are there any sources that speculate as to how these huge commercial flocks have been breached? I would imagine the birds are indoors at such places and the bio-security high. :-/ It would be helpful to know more details about how individual flocks have become infected. Perhaps that answer is just unclear. ![Frown :( :(](/styles/byc-smilies/sad.png)
![Frown :( :(](/styles/byc-smilies/sad.png)