Rebekah Thibodeaux didn’t expect to see her daughter 13-year-old daughter, Lane, back in the saddle so soon. When Lane was diagnosed with melanoma, she was scared and unsure of what to expect. Lane was, too. She was anxious about her future and upcoming rodeo competitions.

For the Thibodeauxes, rodeos are a family affair. Since they were toddlers, Lane and her sisters have been competing in events like barrel racing, pole bending...