Place silicone bone molds on a small baking sheet and set aside.

In a small bowl, stir the plain unsweetened yogurt until smooth and creamy.

In a second bowl, mix the pumpkin puree with 1 tablespoon water, adding a little more water if needed until it reaches an easy spooning consistency.

In a third bowl, lightly mash the berries with a fork, leaving some small chunks for texture.

If using, lightly brush or rub the inside of each bone mold cavity with a thin layer of melted coconut oil.

Spoon a small layer of yogurt into each mold cavity, filling each about one third of the way full.

Add a small spoonful of the pumpkin mixture into each cavity on top of the yogurt.

Add a small spoonful of the mashed berries into each cavity, leaving a little space at the top so the mixture does not spill over.

Use a toothpick, skewer, or the tip of a butter knife to gently swirl the yogurt, pumpkin, and berry layers together in each cavity to create a marbled pattern without fully mixing them.

Tap the baking sheet with the filled molds lightly on the counter to release any air bubbles.

Transfer the molds to the freezer and freeze for 3 to 4 hours, or until the treats are completely firm.

Once frozen solid, pop the yogurt bones out of the molds and serve 1 to 3 treats to your dog, depending on size, as a snack or meal topper.

Store remaining treats in an airtight freezer-safe container in the freezer for up to 2 months.