• Wash the blueberries and apples thoroughly.
• Remove the apple cores and chop the apples into large chunks.
• Add the blueberries and chopped apples to a small pot with about  a 1/4 cup of water.  Turn heat on medium-low and cook until fruit softens, stirring frequently, about 10 minutes. Remove from heat and allow to cool slightly.
• Add apples and blueberries into a blender or food processor. Blend until smooth, adding a small splash of water if necessary.
• Line a baking sheet with parchment paper or use a silicone mat. Spread the puree evenly into a thin layer, about 1/8-inch thick.

Oven method

• Bake at the lowest oven setting (around 170°F / 75°C) for 4–6 hours.

Dehydrator method

• Dehydrate at 135°F for 6–8 hours.

Air Fryer method

• Dehydrate at 140°F for about 6-8 hours.

How to Tell When the Fruit Rollups are Ready

• Fruit rollups are done when they're no longer sticky, appear to be matte, not glossy or shiny, are firm but flexible. Place on counter to cool.
• Once cooled, cut the sheet into strips and roll them up, or cut them into chunks appropriately sized for your dog. A knife, pizza cutter or scissors are all great for cutting the rollups.  Store in an airtight container.