In a blender or food processor, mash the banana until smooth.
Add the peanut butter, yogurt, pureed strawberries, cooked oatmeal, and cinnamon. Blend until well combined.
For fun shapes:
Pour the mixture into silicone molds in fun shapes like bones, paws, or dog faces.
Freeze for a minimum of 4 hours, or until completely set.
Pop the frozen treats out of the molds and store in an airtight container in the freezer.
For regular servings:
Pour the mixture into freezer-safe containers or ice cube trays.
Freeze for a minimum of 4 hours, or until completely set.
Serve the dog ice cream as a frozen treat, or top with crumbled mini dog treats or a sprinkle of peanut butter.