 Bowling developed some of the first blood typing and DNA parentage tests for horses , and became a genetics consultant to several horse breed registries , including The Jockey Club , Arabian Horse Association ( originally Arabian Horse Registry of America ) , American Quarter Horse Association , and the American Morgan Horse Association . Beginning in 1976 , she published research on animal blood types , and developed tests using blood type to establish parentage . She advocated for adopting blood typing for parentage verification of registered animals . Numerous breed registries did so . In the course of this research , she also studied the phenomenon of <unk> , which sometimes created inconsistent results in parentage testing . 
