Ticked or mottled varieties may be either white or black with different colored flecks (ticking), such as the blue-mottled or bluetick beagle, which has spots that appear to be a midnight-blue color, similar to the coloring of the Bluetick Coonhound. Some tricolor beagles also have ticking of various colors in their white areas. Beagles may be prone to epilepsy, but this can often be controlled with medication. Hip dysplasia, common in Harriers and in some larger breeds, is rarely considered a problem in beagles. Beagles are considered a chondrodystrophic breed, meaning that they are prone to types of disk diseases. Beagles are considered a chondrodystrophic breed, meaning that they are prone to types of disk diseases.