Law enforcement administration officials for the Wyoming Livestock Board said the owner of the horses had been under suspicion for some time, and the horses were seized Monday. Among the horses were several pregnant mares and two that had recently given birth.
The horses have since been moved to the stockyard in Cheyenne.
Jimmy Siler, the livestock board's law enforcement administrator, says the board deals with about 100 animal welfare cases every year, and they can vary from one to two animals all the way up to 100.