Contrafreeloading (CFL), i.e. choosing food which requires work over free food, occurs at a higher rate in red jungle fowl (Gallus gallus) compared to White Leghorn layers. We examined whether this ...

Wander through the egg aisle at any supermarket in the United States and you'll mostly see one color: white. Maybe a few brown-shelled options appear, but that's it. Chickens can lay eggs ranging from ...

One-day-old Leghorn-type female chicks were vaccinated with herpesvirus of turkeys (HVT), strain FC 126 (2), and reared together with sister unvaccinated birds. During the 80 weeks of this test, ...

Pennsylvania is the fourth largest producer of eggs in the U.S., and Berks County is the third largest egg-producing county in the state. There are over 2 million layers and 800,000 pullets in Berks ...