Add the pureed blueberries and coconut oil to a small saucepan and place over low to medium heat.

Stir gently until the coconut oil is fully melted, the mixture is smooth, and it is warmed through but not boiling.

Sprinkle the agar-agar powder evenly over the warm blueberry mixture while whisking constantly to prevent clumps.

Continue to cook, whisking, for 3 to 5 minutes until the agar-agar is completely dissolved and the mixture thickens slightly and looks glossy.

If using honey, whisk it into the hot mixture until fully combined.

Remove the pan from heat and let the mixture cool for 2 to 3 minutes until it is warm but no longer piping hot.

Carefully pour the mixture into silicone molds or a shallow glass dish set on a tray for easy handling.

Gently tap the molds or dish on the counter to release any air bubbles and smooth the surface.

Transfer to the refrigerator and chill for 1 to 2 hours, or until the gummies are fully set and springy to the touch.

If using a glass dish, lift out the set sheet and cut it into small, bite sized cubes suitable for your dog.

Store the gummies in an airtight container in the refrigerator and use within 5 to 7 days.