Metro, a 10-year-old retired bay thoroughbred horse stands with owners Ron Krajewski and Wendy Krajewski (R) and one of his paintings at Motter’s Station Stables in Rocky Ridge, Maryland May 2, 2013. Since giving up the track, Metro has begun a successful painting career that has netted about $20,000 in four months. Photo: Reuters

Metro, a 10-year-old retired bay thoroughbred horse stands with owners Ron Krajewski and Wendy Krajewski (R) and one of his paintings at Motter’s Station Stables in Rocky Ridge, Maryland May 2, 2013. Since giving up the track, Metro has begun a successful painting career that has netted about $20,000 in four months. Photo: Reuters

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Metro, a 10-year-old retired bay thoroughbred horse stands with owners Ron Krajewski and Wendy Krajewski (R) and one of his paintings at Motter’s Station Stables in Rocky Ridge, Maryland May 2, 2013. Since giving up the track, Metro has begun a successful painting career that has netted about $20,000 in four months. Photo: Reuters

Metro, a 10-year-old retired bay thoroughbred horse stands with owners Ron Krajewski and Wendy Krajewski (R) and one of his paintings at Motter's Station Stables in Rocky Ridge, Maryland May 2, 2013. Since giving up the track, Metro has begun a successful painting career that has netted about $20,000 in four months. Photo: Reuters

Metro, a 10-year-old retired bay thoroughbred horse stands with owners Ron Krajewski and Wendy Krajewski (R) and one of his paintings at Motter’s Station Stables in Rocky Ridge, Maryland May 2, 2013. Since giving up the track, Metro has begun a successful painting career that has netted about $20,000 in four months. Photo: Reuters