A lawsuit seeking damages for owners whose horses ingested feed allegedly tainted with monensin has been refiled in part to seek compensation for the animals’ emotional value to their owners.

Monensin is an ionophore antibiotic sometimes included in ruminant, swine, and poultry feed that is toxic to horses.

In September 2015 Western Milling LLC voluntarily recalled some batches of Western Blend horse feed after learning that several horses reported to have consumed the feed either became ill or died. The recall covered 50-pound bags, LOT 5251, manufactured by Western Milling on Sept. 8, 2015. The feed was distributed to retailers in California and Arizona.

Prior to the recall, feed from LOT 5251 was sold to Black Fence Farm in Clovis, California. A total of 51 animals at the farm consumed the feed, said Florida-based attorney Andrew Yaffa, who is representing the Black Fence Farm horse owners