 The "Animal People" founders initiated neuter/return trials for feral cat population control in 1991, and in 1992 the program expanded to eight sites.In mid-1992 Bartlett and Clifton presented their findings at a conference sponsored by the Cummings School of Veterinary Medicine at Tufts University.This was among the several developments which established trap–neuter–return in the U.S. as a viable approach.