Residents of Hollister and san benito county can take advantage of a free offer on Tuesday, for free microchips for pets. The G.P.S. microchips are being given away by the Hollister Police Department’s Animal Control Bureau, after it received an anonymous donation. 1-hundred certificates for the devices will be given away; they can be picked up at the Hollister Animal Shelter from 1 to 4 p.m.