Bird flu has wiped out 7.4 million chickens in Pennsylvania in the past month, a swift and devastating loss that veterinarians and industry members suspect may be linked to an unusually cold winter. Infections of flocks raised to produce eggs …
Bird flu has wiped out 7.4 million chickens in Pennsylvania in the past month, a swift and devastating loss that veterinarians and industry members suspect may be linked to an unusually cold winter. Infections of flocks raised to produce eggs …