Lysine: Can Too Much Be Bad?

We all know that proper supplementation is one of the key factors that boosts overall poultry health and wellness. Lysine is one major component that is incorporated in feed rations for a wide range of species. This article in Extension that discusses basic poultry nutrition even mentions it in the protein section of the said article. But according to an article in The Poultry Site, too much lysine can be a bad thing for your flock.

Jenny Fricke, DVM, a veterinarian at the University of Saskatchewan, and some of her research colleagues were asked find out why some 7-day old chickens were grossly underweight. According to her, they were half the weight they should be.

Fricke cut them up, looking for lesions or signs of common diseases in poultry. This yielded no clues. Upon examining birds from other floors, she found that some became lame at 12 days of age. The investigation soon yielded results.

They studied 500 caged, fed, and given lysine increased by 2, 4, 6 and 8% birds. They noticed that higher supplementation made the birds eat less and their weight declined. To read more about the research and findings, click here.

Visit our company website for recent news and updates! You may also follow #ContinentalSearch on LinkedIn and Facebook for U.S. poultry jobs and other job opportunities in the animal health industry.

Trish Valenzuela • CPC/ PRC • Poultry Recruiting Specialist


Trish Valenzuela specializes in recruiting for poultry feed additive companies and has filled positions in technical support, sales, and sales management across the United States.

She joined Continental Search in July 2015 and through hard study, she passed two certification programs. Now she is a Certified Personnel Consultant (CPC) and a Professional Recruiting Consultant (PRC).

Visit her LinkedIn profile to connect with her and stay updated with current poultry trends. She can be reached at (302) 248-8242, through LinkedIn, or at

No comments yet.

Leave a Reply