Solid colored offspring of two registered Paint parents, called "Solid Paint-Breds" or "Breeding Stock Paints," are also eligible for registration, with certain restrictions. They are able to participate in some recognized Paint breed shows, and there are alternative programs offered, and many incentive programs within the registry are available to Solid Paint-bred horses. If a solid-colored horse is bred to a regular registry Paint horse, it is possible to produce a spotted foal. In some cases, such as the recessive Sabino patterns, described below, even a solid colored horse may still carry genes for color. However, in the case of the dominant Tobiano pattern, a Breeding Stock Paint will not carry these color genes, though it may retain other desirable traits.

The APHA has established the Breeding Stock registry for those horses who meet all bloodline requirements but lack sufficient white hair with underlying, unpigmented skin to be included in the Regular Registry. The Breeding Stock registry was developed so as not to lose the potential offspring of horses eligible by blood to be Paint Horses but how lack the Paint coloring. Horses registered in the Breeding Stock registry can be shown at APHA approved shows in separate Breeding Stock classes and earn points toward their Register Of Merit (ROM), Superiors, and Championships. All registered Paints, Regular or Breeding Stock can compete in the Outside Competitive Activities Programs (OCAP).