Wash the strawberries and blueberries thoroughly under cool running water, then pat them dry.

Hull and chop the strawberries into small pieces, then measure 1 cup.

Measure 1 cup of blueberries; if using frozen berries, do not thaw them.

Peel the ripe banana and break it into chunks.

Add the strawberries, blueberries, and banana to a blender, placing the banana on the bottom.

Blend until smooth and pourable, stopping to scrape down the sides as needed.

If the mixture is too thick or the blender struggles, add the water 1 tablespoon at a time and blend again until it reaches a smoothie like consistency.

Pour the fruit puree into silicone molds or ice cube trays, leaving a small space at the top to prevent spills.

Place the filled molds in the freezer and freeze for at least 4 hours, or until fully solid.

Once frozen, pop the treats out of the molds, serve 1 treat to your dog, and store the rest in an airtight container in the freezer.