Medical science has not yet convincingly duplicated the remarkable properties of cartilage, an omission that sustains an epidemic of life-altering knee replacement surgeries. Anthony Ratcliffe, CEO of Synthasome Inc., of Del Mar, Calif., said on a recent FDA webinar that companies might want to consider the lowly goat as the animal model of choice in preclinical studies of cartilage products because “the cost, ease of management, and the social aspects were all manageable” with goats.