The San Angelo Animal Shelter will host a microchipping clinic for pets from 8 a.m.-2 p.m. Saturday, July 28th, at Tractor Supply, 2701 Southwest. The cost is 13 dollars per animal. City ordinance requires that all dogs and cats older than 4 months must be microchipped. This helps animal control officers reunite lost pets with their owners. The shelter, at 3142 U.S. Highway 67 North, provides microchipping for 13 dollars weekdays.