Grate the carrots finely using a grater. If your dog prefers larger chunks, you can finely chop the carrots instead.
In a bowl, combine the finely grated carrots and pumpkin puree. Gradually add the water, mixing well to create a smooth consistency. Adjust the amount of water to achieve a pourable, but not too watery, mixture.
Pour the mixture into ice cube trays or silicone molds. Tap the trays gently on the counter to remove any air bubbles and ensure the mixture settles evenly.
Place the filled molds in the freezer and let them freeze until solid, typically for about 4-6 hours or overnight.
Once frozen, pop the ice treats out of the molds and store them in a sealed container or freezer bag in the freezer until ready to serve.