Pre-heat oven to 350ºF.
In a saucepan, add chicken and beet. Fill with enough water to cover ingredients and cook on a medium/high heat. Let this go until the chicken is fully cooked and the beet is soft, about 15 minutes.
Transfer cooked chicken and beet to a food processor or blender. Add egg and blend. You will need to lift the top and use a spoon or baking spatula to scrape down the sides a few times. Blend until ingredients are smooth.
Spoon bright-colored mixture into a heart-shaped, oven-safe silicone mold (or another mold of your choice). If using silicone, place onto a baking sheet before transferring to the oven for support.
Bake at 350ºF for 20 minutes.
Once fully cooked, let treats cool in the mold for about 10 minutes, or until the mold is cool enough to touch. Then, remove treats from mold and let them finish cooling on a wire rack.