NAF GastriVet Pellets. Developed by world leading veterinary scientists and nutritionists, NAF GastriVet Pellets is a natural and nutritional feed that helps to support a healthy digestive system. Helping to maintain a healthy gastric environment, GastriVet Pellets helps to support the anti-inflammatory processes and helps to sooth the stomach walls and encourage a healthy pH level in the gut. Perfect for competition and performance horses, GastriVet can also be used to help support veterinary treats as an aftercare regime.