Staff at the Tri-County Humane Society shelter in St. Tri-County Humane Society Tri-County Humane SocietyJack is a chill middle aged dog who looks forward to his next set of adventures. More than one adoption hold may be placed on an available animal and will be honored in the order they were received. Tri-County Humane Society Tri-County Humane SocietyHere's how to contact the Tri-County Humane Society. The Tri-County Humane Society is open:Monday-Friday, Noon to 6 p.m.Saturday and Sunday, Noon to 5 p.m.