6 Best Dog Foods with Taurine - iHeartDogs iheartdogs.com/best-dog-foods-with-taurinePrivate View Chicken Hearts: Organ meats like chicken hearts are among the richest sources of taurine. Beef Liver: Another organ meat, beef liver contains high levels of taurine and can be included in a balanced diet for dogs. Fish: Especially oily fish like mackerel and salmon, are good sources of taurine.