Beagles, Harriers, Foxhounds, Coonhounds and Bloodhounds among others. In one study laboratory-bred Beagles were divided into three groups. There is also one pack of beagles in Virginia that hunt fox. Besides beagles, genetic modification has also been done in pigs and fish. Tricolor beagles are almost always born black and white. Some tricolor beagles also have ticking of various colors in their white areas. The following year the Association of Masters of Harriers and Beagles was formed. Tomlinson competed for athletics club Newham and Essex Beagles for some time. Hypothyroidism and a number of types of dwarfism occur in beagles. The inspectors seized photographs showing beagles having convulsions inside sealed containers. Ohuruogu is a member of Newham and Essex Beagles Athletics Club. Some beagles gradually change color during their lives, and may lose their black markings entirely. Of the two beagles that were genetically modified, only one had increased muscle mass.