The local farms here at least are being really cautious about testing and isolation. Many of them sell their eggs to the local grocery stores, so they are bound to the same standards as other eggs.

I don’t see what benefit they would gain by not testing, anyway: if their flock is infected and a significant portion of the birds die, they are going to lose revenue the same way a massive egg producer would. If anything, I’d imagine them to want to be more cautious, since they have fewer eggs in their basket as it were (fewer total chickens).