Preheat the oven to 350°F (175°C)
Mix 2 cups whole wheat flour, 1 cup rolled oats, and 1/2 cup peanut butter
Add 1 cup water or as needed to form a dough
Roll out the dough on a floured surface
Cut into small dog treat shapes
Place on a baking sheet lined with parchment paper
Bake for 20 to 25 minutes
Let the treats cool completely
Store in an airtight container