Place the peanut butter, pumpkin, and coconut in a bowl. Stir until well-combined and smooth.
If using rolled oats, blend them in a blender or food processor until they have a flour consistency.
Add the oat flour to the peanut butter mixture and combine well using a hand mixer or a spoon.
Roll the mixture into balls, about 1-inch thick for smaller treats and up to 2-inches thick for larger treats.
Place the balls on a parchment paper lined tray.
Use a fork to press a crosshatch design into the treat if desired.
Refrigerate for at least 1 hour or until firm.
Store the treats in an airtight container in the refrigerator.
Notes
Do not use peanut butter that contains xylitol, a sweetener toxic to dogs.Be sure to use plain pumpkin puree and not pumpkin pie filling because it may contain sugar and other ingredients harmful to dogs.The treats will last for 5 days in the refrigerator.Freeze the treats for longer storage. They will last up to 3 months in the freezer. Thaw them in the refrigerator overnight.You can bake the treats at 350°F for about 20 minutes or until the edges begin to brown.