Clumping animal litters containing composite particles with increased absorptivity and clump strength are disclosed. Reinforcing fiber materials are combined with a liquid-absorbing material to form composite particles suitable for use as animal litter. The reinforcing fiber materials add structural integrity to the liquid absorbent materials by acting in a manner similar to reinforcing bars (i.e., rebar) in concrete. The fibers need only be present in small percentages to show a consumer noticeable benefit.