Rio is all flesh and blood, with one small addition. To mark his 5th birthday today, my partner and me accompanied our four-footed pal and his owners, who live across the street, to the Boston Animal Control site in Roslindale. There he was outfitted with a microchip. For $20 you get a high-tech identifier that will let any rescue center or kennel that has a scanner to find out your name and phone number. It’s a great deal and provides lots of peace of mind, especially if your canine likes to roam free occasionally, as Rio does. Happy Birthday Rio!