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Home » Authors » Stephen LeBlanc
Stephen LeBlanc

Stephen LeBlanc

Professor and Director of Dairy / University of Guelph
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Articles

ARTICLES

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Devrions-nous viser la longévité ou prolonger la durée de lactation des vaches laitières?

Il n’existe pas de recommandation universelle en matière d’objectifs. Il est important d’évaluer toutes les données disponibles pour évaluer la longévité et la durée de lactation.
November 17, 2025
Stephen LeBlanc

Dans de nombreux pays, le secteur laitier débat actuellement pour savoir s’il convient de se fixer comme objectif explicite d’augmenter la longévité des vaches. Certains affirment que le fait de garder les vaches plus longtemps en lactation ou pendant plus d’années contribue à la durabilité, car cela réduit le nombre d’animaux de remplacement nécessaires et donc les coûts environnementaux liés à ces animaux non productifs.


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Should we target longevity or extend lactation length for dairy cows?

There is no ‘one-size-fits-all’ recommendation for targets. Assessing all data available is important when weighing longevity and lactation length.
August 5, 2025
Stephen LeBlanc

There are discussions in dairy industries in many countries about whether it should be an explicit aim to increase longevity. Some assert that retaining cows for longer lactations or more years contributes to sustainability because fewer replacement animals would be needed, reducing the environmental costs of these non-productive animals.


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Managing metritis in dairy cows

Metritis in dairy cows, caused by bacterial infections, impacts milk yield and fertility. It requires timely antibiotic treatment and ongoing research to refine protocols for better outcomes and reduced economic losses.
January 17, 2025
Stephen LeBlanc

Most dairy cows have potentially disease-causing bacteria in their reproductive tract in low abundance. Cows develop uterine infection and disease when the pathogens overgrow and become dominant. Cows need to have a rapid, robust and well-regulated inflammatory response in the uterus during and immediately after calving to detach the placenta, keep bacterial pathogens in check and start uterine repair.



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Improve metritis diagnosis and treatment to boost reproductive performance

October 18, 2016
Stephen LeBlanc
Properly identifying uterine diseases like metritis and developing effective treatment protocols can be a bit of a challenge for dairy farmers and their management teams.
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4 keys to corral ketosis

April 18, 2016
Stephen LeBlanc
As dairy producers can attest, ketosis is a common health challenge. However, without a routine testing program, many producers do not realize how many of their cows are affected. Several large studies indicate that, on average, more than 40 percent of cows experience ketosis at least once during the first two weeks after calving.
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