Add chicken breast and veggie of choice (broccoli, if making green treats ... or beet, if making red treats) to the saucepan. Fill with enough water to cover.
On medium heat, let cook for about 20-30 minutes. When finished, the chicken breast will be fully cooked, the veggies will be soft, and the water will be infused with flavor.
Transfer chicken, veggies, and 1/2 cup of the warm broth to a blender. Puree until smooth.
Add gelatin powder and mix for several minutes, until the gelatin is fully dissolved. Mix well to ensure the gelatin powder is evenly spread.
Place a silicone mold onto a baking sheet for support and spoon the mixture into each mold, filling to the top.
Move to the refrigerator for 1-2 hours, or until fully set.
Remove jello-like treats from the mold. Store in an airtight container in the refrigerator up to 4 days.