Preheat an oven to 175°C and line two baking trays with parchment paper.
Into a mixing bowl add the eggs and beat lightly, then stir in the bacon grease, bacon, milk, and water.
Pour the whole-wheat flour gradually into the wet mixture, stirring continuously to combine.
Once the dough is set divide the mixture between two baking trays.
Roll out the dough to the shape of the tray and uniform thickness.
Bake in the preheated oven for40 minutes then remove from the oven.
While the dough is still warm, turn out onto a chopping board and cut into small cubes, depending on the size of your dog.
Allow the homemade dog treats with bacon grease to cool then store in an airtight container in the refrigerator for up to 1 week.