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;[48] Hip dysplasia, common in Harriers and in some larger breeds, is rarely considered a problem in Beagles.[49] Beagles are considered a chondrodystrophic breed, meaning that they are prone to types of disk diseases.[50]