Gone to the dogs Suspicions that embedded microchips are causing some dogs in Ireland to shrink has resulted in several investigations being launched. Fri 1 Apr 2016 Jack Russell dogs appear to be affected by the faulty microchips more than most - some reducing in size by up to 100%. Frank “Steel” Doyle, from Co Kilkenny, with his dog, Toodles Galore. Social media has been flooded with reports about the controversy. @Polar_Foil tweeted: "Woke to find my Chihuahua had gotten even smaller. #Nightmare #NewCollar" One of the many victims of the faulty microchips. This Dachshund is, apparently, five years old. Two Doberman Pinschers - Boone and Flair Polo. Their owner says both were born from the same litter, but, as yet, only Flair Polo has been microchipped. Some owners are worried about whether their already small dogs, such as chihuahuas, will get even smaller.