Chopped raspberries are a good substitute for diced strawberries or the small whole blueberries.
You can mix 1 mashed ripe banana into the plain greek yogurt for added sweetness.
You can substitute nonfat greek yogurt if you are concerned about your pets fat/caloric intake.
Nutrition Info
Calories: 5kcal | Carbohydrates: 1g | Protein: 1g | Fat: 0.03g | Saturated Fat: 0.01g | Polyunsaturated Fat: 0.01g | Monounsaturated Fat: 0.004g | Cholesterol: 0.3mg | Sodium: 2mg | Potassium: 13mg | Fiber: 0.1g | Sugar: 1g | Vitamin A: 2IU | Vitamin C: 2mg | Calcium: 6mg | Iron: 0.02mg