Dairy producers are increasingly putting internet-connected collars and ear tags on their cows, helping better track the animals’ health and breeding.

Stray feathers litter the ground inside the empty coop at Kakadoodle Farm. A few beige eggshells crunch underfoot. No hens were left alive.

Kennedy Jr. proposed a novel fix to the nation’s bird flu epidemic: Let the virus spread. “They should consider maybe the possibility of letting it run through the flocks so that we can identify the birds,