Welcome to Pet Samaritan Clinic Pet Samaritan Clinic was established in the early 1900s to care for the horses that pulled the trolleys from the Willamette River into the Portland residential area. Nearly 100 years later, the clinic remains in its original location on East Burnside in Portland, Oregon. Our little red brick building has welcomed many, many pets into its open door. We are always accepting new patients. At Pet Samaritan Clinic, its all about the animals. Since 1982, our skilled and compassionate staff has provided complete veterinary care for the creatures that make our lives whole.