A year ago, 80 to 90 percent of the cats that came into the Lancaster County Animal Shelter had to be euthanized to make room for the continuous influx of new animals. In the last quarter of 2017, only 12 percent were put down, thanks to the overwhelming success of the county’s TNR (trap, neuter and return) program. December’s numbers were especially striking, with only 21 cats euthanized because of lack of space.