The typical longevity of beagles is 12–15 years, which is a common lifespan for dogs of their size.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. The following year the Association of Masters of Harriers and Beagles was formed. (The brown may take between one and two years to fully develop.) Some beagles gradually change color during their lives, and may lose their black markings entirely. The typical longevity of beagles is 12–15 years, which is a common lifespan for dogs of their size.Beagles may be prone to epilepsy, but this can often be controlled with medication.
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