Crow says the Colorado-based Cloud Foundation will get a share of the gate from her show with Kid Rock at Cheyenne Frontier Days on July 22.
The Grammy Award winner who grew up in Missouri says she shares the foundation's dedication to the preservation of wild horses on public lands.
The group's lawyers are due in federal court in Reno on Thursday. They're trying to win an emergency injunction to block the Bureau of Land Management's roundup of 1,700 mustangs scheduled to begin next weekend along the Nevada-Utah line.
