Mix all ingredients in a bowl. I use my hands and break up some of the blueberries. Be sure it’s well mixed, dough should be loose resembling drop cookie dough.
Drop rounded tablespoonfuls of batter on to a parchment covered baking sheet. You can adjust the size of the treat by adjusting the amount of dough you drop on the sheet. I made 30 treats each about 1 1/2″ in diameter. I break them up when I give them to her.
Bake at 350 degrees for 30 minutes.
Cool and store in the fridge in airtight containers.