I am looking for a recipe for coating dog biscuits with that hardens when cooled and doesn’t need refridgerating.

i have made a sweet alternative dip for a milkbone. It was melted carob non sweetened carob and a couple of tablespoons of canola or olive oil. Don’t over heat it as it will harden if you do. DIP each bone in the mixture and put in the freezer for a fast set. My dogs love it and i love it to it is edible for dogs and humans.