How can i decorate homemade dog biscuits? [closed]

You can use animal (hide) glue to make the sprinkles stick, similar to the adhesive on some envelopes that can be licked (or moistened otherwise) to activate the 'stickyness'. The content of the glue is not really that far off from the ingredients in dog food.

Any gelatinous based adhesive would also probably do. While they offer no nutritional value, they are edible.

Non toxic paste, such as used by young school children would also work, but I don't know if the color would ruin the presentation you're trying to achieve. I'd go with the animal glue if you're able to source it. Just melt it down and use a fine paint brush to paint the dog's name, apply the sprinkles and let dry, then shake / blow off the excess.

You could use egg whites, well beaten, (from pasteurized eggs), and a fine tipped squeeze bottle or a narrow paint brush to apply it, then sprinkle and let it dry.

They also make those tubes of icing sugar to decorate cookies that come in all kinds of colors. They look like small tubes of toothpaste and some are even sugar free in this kind of gel form that you can write/decorate very easily with. I've seen them in the baking isle of a well stocked grocery store but also can be found for sure at a craft store such as michaels or AC Moore.