Cook the sweet potato by washing, peeling, and cutting it into chunks. Boil for 15-20 minutes until tender. Drain and cool.

Prepare the banana by peeling and slicing a ripe banana into smaller pieces. Set aside.

In a blender, combine cooled sweet potato, banana, peanut butter, Greek yogurt, and water.

Blend until smooth, adjusting water for desired consistency.

Serve the smoothie in your dog's bowl or freeze in molds. Top with crumbled biscuits or yogurt if desired.

Store any leftovers in an airtight container in the refrigerator for up to 3 days.