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Archaeologists Find Ancient Cheese Makers Used Tree Leaves to Boost Milk Production

By Doris Fleischer

A study published in Nature Ecology and Evolution sheds light on the innovative practices of Central Europe's early cheese makers.

Researchers at German Archaeological Institute (Berlin), University of Bristol, Museum National d'historie Naturelle (Paris) and Kiel University conducted and collated over 2,000 stable isotopic measurements of cattle teeth, bones, and pottery fats, revealing how pioneer farmers adapted their cattle herding techniques to the rich forested landscape of Central Europe.

Led by Dr. Rosalind Gillis from the German Archaeological Institute in Berlin, the study highlights an intriguing early practice: feeding cattle with leaves collected from trees during the summer to sustain them through the winter.

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Biosecurity Audit Common Findings - Dr. Erin Kettelkamp

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In this episode of The Swine Health Blackbelt Podcast, Dr. Erin Kettelkamp from Swine Vet Center reviews common biosecurity audit findings from the Spring 2026 outbreak season across the Midwest. She explains how PRRS pressure exposed filtration leaks, transport gaps, smoke testing needs, and daily execution issues that can weaken even strong biosecurity investments. Listen now on all major platforms!

"Basic biosecurity execution can determine whether a filtration investment delivers real protection or leaves costly gaps exposed."

Meet the guest: Dr. Erin Kettelkamp is a consulting swine veterinarian with Swine Vet Center in northern Illinois. She specializes in herd health, biosecurity, and disease prevention across all phases of swine production, with applied field research focused on disease prevention and practical biosecurity solutions. Learn more from Dr. Erin Kettelkamp on The Swine Health Blackbelt Podcast, available on all major platforms.