Most prolific chicken
- Who
- White Leghorn (No. 2988)
- Where
- United States
- When
- 01 January 0001
The highest authenticated rate of egg-laying is 371 in 364 days, laid by a White Leghorn (No. 2988) in an official test conducted by Prof. Harold V. Biellier ending on 29 August 1979 at the College of Agriculture, University of Missouri, USA.