The current top comment [0] on this submission said he was "curious about this being a trans fat". This would be a result of biohydrogenation, where the bacteria in the ruminants stomachs will add hydrogen to the unsaturated oils.
First link for biohydrogenation: https://www.megalac.com/resources-advice/fats-advice/71-bioh...
Biohydrogenation is a totally different process from the hydrogenation used to make margarine from seed oils.
Ruminal microbe of biohydrogenation of trans-vaccenic acid to stearic acid in vitro - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3305423/