Nestlé Purina Petcare of St. Louis has launched an app designed to aid veterinary staff in diagnosing gastrointestinal issues in cats and dogs. The Purina Veterinary Diets GI Diagnostic App, available in the Apple App Store, works like a digital version of the company’s GI Quick Guide, allowing iPhone and iPad users to streamline the diagnosis of GI issues, according to Kristine Costello, manager of veterinary digital communications for Nestlé Purina Petcare. The program uses algorithms to aid in localizing GI conditions and considers history, physical exams and test results in helping to make a diagnosis. It also traces normal and abnormal signs, rules out issues and suggests steps to resolve the issue. The app covers symptoms such as anorexia, constipation, diarrhea, flatulence, regurgitation, vomiting and weight loss. The GI Diagnostic App will be available for Android devices this fall, the company said.