Peeking Pup - Breckenridge, Colorado - An Australian Cattle Dog takes a peek out a horse trailer during a rodeo in Breckenridge, Colorado. Photo by Thomas Cooper lightboximages.com #colorado #australiancattledog #blueheeler #dog #rodeo #dog #west #county #horsetrailer #breckenridge #summer #lightboximages #lightboximagesphotography #ngs #photooftheday #natgeoyourshot