Some of Stubbs's most acclaimed horse paintings include Whistlejacket (c. 1762), which showcases a rearing stallion in near life-size form, and Gimcrack on Newmarket Heath, with a Trainer, a Stable-lad, and a Jockey (c. 1765), highlighting the famous racing horse Gimcrack. His painting, Mares and Foals in a River Landscape (c. 1763 - 1768), also remains a testament to his commitment to equine subjects.