The Collaborative International Dictionary of English v.0.48:
Fourfooted \Four"foot`ed\, a. Having four feet; quadruped; as, fourfooted beasts. [1913 Webster]WordNet (r) 3.0 (2006):
four-footed adj 1: having four feet [syn: quadrupedal, quadruped, four- footed] [ant: biped, bipedal, two-footed]