Woof (also styled as “The Woof”) is a Denver-based pet care brand founded by Daniel Haarburger in 2019 after inventing the refillable, enrichment-driven Pupsicle toy to support his dog Milo’s post-surgery recovery. The company focuses on intelligently designed toys, treats, and dental solutions that make dog care easier and more engaging—prioritizing quality, sustainability, and the joy of time spent with pets.