The Palomino Rabbit owes its existence to the selective breeding efforts of Mark Youngs of Coulee Dam, Washington, who began developing the breed during the early 1940s. Youngs set out to create a commercial rabbit whose coat color would evoke the rich golden tones of the Palomino horse, a coloring that had no established counterpart among recognized rabbit breeds at the time. His foundation stock consisted of a variety of tawny and fawn-colored rabbits, and historical accounts suggest he drew on crosses that likely included commercial breeds carrying dilute and agouti color genetics. The precise combination of founding breeds was not formally documented in the manner that modern breeding programs would require, but Youngs was systematic in selecting for a warm, even golden color across the entire body, free of ticking, smut, or sooty patches that frequently plagued early attempts at golden-colored rabbits.
Youngs initially referred to his creations as Washingtonian rabbits, a name that reflected their geographic origin in the Pacific Northwest. The early animals varied considerably in shade and body type, as any new breeding project would, and Youngs spent several years culling aggressively and refining his selections before he considered the breed stable enough for public exhibition. During this period, he corresponded with other rabbit breeders across the western United States, exchanging stock and ideas as he worked to fix the golden color and develop a body type suited to commercial meat production. The collaborative nature of this early development meant that the breed benefited from a relatively broad genetic base compared to some breeds that originated from a single breeder's closed herd.
The decision to rename the breed the Palomino came as Youngs and his fellow breeders recognized the marketing appeal of associating their golden rabbits with the popular and visually striking Palomino horse. The name change proved to be a masterstroke of breed promotion. The word Palomino immediately communicated the color to anyone familiar with horses, and it gave the breed a distinctive identity that set it apart from other fawn or sandy-colored rabbits that already existed in the fancy. This renaming occurred in the late 1940s and coincided with the formation of breed-specific support organizations that would guide the Palomino toward official recognition.
By the end of the 1940s, Youngs had established a breeding population that was reproducing true to type with sufficient consistency to begin seeking formal recognition from the American Rabbit Breeders Association. The breed was presented at regional shows in the Pacific Northwest, where it attracted attention for its unusual and appealing color, its solid commercial body type, and the docile temperament that Youngs had deliberately selected for alongside physical traits. The combination of beauty and utility positioned the Palomino as a serious contender for national recognition in an era when the American rabbit fancy was actively expanding its roster of accepted breeds.