Does feed additive kill cows? It was supposed to reduce methane emissions in cattle

From October 1, 2025, Denmark has introduced a requirement to limit methane emissions from dairy cattle farming. Among the methods proposed to farmers is a substance called Bovaer, which is intended to inhibit methane production in the rumen of cattle. However, farmers using this feed additive claim that it is harmful to the animals, reports Agrarheute. Research following farmer complaints The Danish Dairy Producers' Association reports numerous complaints from farmers who say there is a gradual decline in milk production from cows eating Bovaer, and even suspicions that the product causes cattle to collapse. Media reports have emerged of unexplained cases of "fatal sleeping cows." As a result of these sensational news stories, scientists from the University of Aarhus have been commissioned to conduct research to definitively explain whether Bovaer can in any way harm cattle and whether it is linked to cattle collapses. Less methane thanks to the additive Bovaer uses the active ...