The Bureau of Land Management (BLM) has withdrawn a controversial mustang gather plan that would have created minimally producing wild horse herds on two Wyoming ranges.

In June, some wild horse advocates criticized the BLM when the agency announced that it would gather animals from the White Mountain and Little Colorado Herd Management Areas in Wyoming, and spay mares and castrate stallions to reach designated appropriate management levels (205-300 for the former and 69-100 for the latter). Sterile herds would reside on both ranges.

The BLM later revised its plan to exclude the spaying of mares. Under a revised plan the BLM would begin gathering approximately 873 animals from the ranges on Aug. 16. Following the gather, approximately 177 geldings would be returned to the ranges. No mares would be returned to the range. BLM Spokesperson Tom Gorey said the gather’s goal is to create a minimally reproducing herd containing 177 geldings and 97 breeding horses.

Three days later, Arizona Congressman Raul Grijalva and colleagues issued a letter asking Secretary of the Interior Ken Salazar and BLM Director Bob Abbey not to sterilize any wild horses under BLM jurisdiction