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Steve Leeson
Health, welfare, nutrition, productivity, food safety, environment - those are key words for the Poultry Health Research Network (PHRN). Established in 2012, we are a network of poultry researchers and poultry health specialists who address a wide range of issues - from basic biology, to environmen...
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Participation in Forum on August 20, 2025
At 21c you may get faster growth rate (0.2-0.3d) but inferior feed efficiency (+0.01-0.02) depending on efficiency of ventilation system
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Participation in Forum on August 18, 2025
Mario, always good to talk to you. Mash vs. pellets adds another dimension to feed intake. For broilers, it’s obvious that the physical density of a pelleted feed allows for faster intake of a given quantity of feed. Pellet size likewise influences time spent feeding. Both these factors greatly impact intake and growth after about 25d at higher stocking densities, when we invariably see slow ...
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Participation in Forum on February 24, 2025
@Kevin Stickney In theory, yes. You could offer feed and oyster shell, etc., and they would balance their nutrient needs. The practical issue is that birds invariably take too much oyster shell because of its novel texture. We see this in small flocks where a calcium feeder is set up. Birds consume 8-10g/d of oyster shell and then soft shelled eggs appear because of an induced P deficiency. You co ...
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This member gave a presentation on February 12, 2025
At the following event:
36th Annual Australian Poultry Science Symposium
Article published the February 11, 2025
All commercial poultry eat with reasonably good precision to balance nutrient intake with requirements. Short term, there can be some variation in feed intake related to local situations, but long-term, the mechanisms of feed intake regulation are quite precise. Matching nutrient needs with intake is an obvious inherent evolutionary necessity to ensure survival and reproduction. A bird’s dai ...
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News published on October 4, 2024
The 36th edition of the APSS will be held at The University of Sydney – Abercrombie Business School, from 10-12 February 2025. These will be some of the major themes: Layer Nutrition and Egg Quality, Broiler Nutrition, Managing Antibiotic-free Production, Sustainable use of Protein Ingredients and Avian Influenza.        11 invited speakers are confirmed: - Vitor Ar ...
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Video published on July 11, 2024
Steve Leeson (Professor Emeritus, University of Guelph) talks about the evolution of the modern broiler and its response to energy and amino acids in diet formulation, as well as the impact of energy and fat on feed costs, in this Engormix interview.
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Video published on July 11, 2024
Steve Leeson (Professor Emeritus, University of Guelph) comments on the use of amino acids in broiler nutrition and the performance of low energy diets, in this Engormix interview.
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Video published on July 11, 2024
Steve Leeson (Professor Emeritus, University of Guelph) explains the advantages of Apparent Metabolizable Energy (AMEn) over other methodologies, and comments on the relevance of nitrogen retention in this Engormix interview.
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Article published the September 7, 2021
1. IntroductionUnder normal circumstances, excessive free radicals are scavenged by body enzymatic and non-enzymatic antioxidants, but oxidative stress can occur when the amount of oxidant production surpasses the capacity of the body’s antioxidant system [1,2]. Different aspects of avian productive and reproductive performances, such as egg production rate and egg quality traits, as well as ...
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equalizer Statistics: Articles(10)Videos(3)Forums(3)
Information
Location:Milton, Ontario, Canadá
Profile: Academic / scientific
Occupation: Veterinary Doctor
Participations in events:
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