Beagles may be prone to epilepsy, but this can often be controlled with medication. Hypothyroidism and a number of types of dwarfism occur in beagles. Two conditions in particular are unique to the breed: "Funny Puppy", in which the puppy is slow to develop and eventually develops weak legs, a crooked back and although normally healthy, is prone to a range of illnesses; and Musladin-Lueke syndrome (MLS) in which the eyes are slanted and the outer toes are underdeveloped but otherwise development is as normal. 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.