Stratford News Perth District Health Unit searching for dog involved in biting incident in St.Marys SHARE ON: Casey Kenny, staff Tuesday, Aug. 14th, 2018 Influenza officially arrives in Perth County. Photo supplied by www.hpha.ca. The Perth District Health Unit is searching for a dog involved in a biting incident in St.Marys. They say it happened on Queen Street near the TD Canada Trust Bank around 10:15 p.m. last Saturday. According to the PDHU, the dog was being walked by a couple who said they were from Stratford and the dog is described as a medium-sized white dog with short hair. The Health Unit is investigating to see if the dog has up-to-date rabies shots and if the dog is not found the person who was bitten may need to complete a series of rabies shots. The PDHU says you should always obtain the contact information of the owners involved in a biting incident.