Blue Cat Deterrent Spray: Surprising Insight Testing Non-Toxic Scratch Protection We were intrigued by the Blue Cat Deterrent Spray’s promise of safe, non-toxic protection for furniture while training our kittens. Upon testing, we noticed its natural ingredients create a mild yet undeniable scent cats dislike—enough to redirect claws without harsh chemicals. The spray’s consistency feels lightweight, leaving a faint residue that wears off quickly but remains potent enough to discourage scratching. We appreciated its versatility for both indoor and outdoor use, making it a practical addition to our pet care routine. What surprised us was its lasting effectiveness; even the most persistent kittens hesitated after a single application. The blue hue is subtle, blending with most surfaces, and the anti-scratch formula proved gentle enough for daily use. So far, our furniture is intact, and our kittens are learning without stress. It’s a small bottle with a big impact.