Four horses were killed in a barn fire in rural Boulder County, Colorado, on Sunday, Oct. 1, 2017. Authorities are investigating the possibility it was arson. -- Photo courtesy of Janiejill Tointon.

Four Horses Killed in Colorado Barn Fire

A blaze that killed four horses in Colorado, including three sons of reined cow horse stallion Shining Lil Nic, may have been intentionally set.