The wild horse roundup is underway in Wyoming, and the first of the mustangs arrived in their holding pens today.

But Colorado wild horse advocate Mary Young says many have been lost along the way.

She says that's because the methods have been brutal, including the use of helicopters.

And, according to Young, they aren't supposed to be clearing Wyoming of wild horses anyway.

Statue stipulates there can be 37,000 wild horses on the ranges, and in the 19809's, there were still 8000 in Wyoming.

This roundup will take it down to zero.

Young said she'd love to see Governor Mead, who is a rancher, get involved to stop the roundup.