Vet's Best Comfort Calm Gel for Cats 100g A soothing cat comfort, this non-sedating gel, helps reduce anxiety during times of instability and the effects of environmental stress in cats showing signs of nervousness, aggression, hyperactivity or discontentment. Helps provide relief to common stresses such as fireworks, thunderstorms, boarding, loud noise, environmental stress, and travel. Give your cat at least 3 hours before the noisy event, our classic chicken flavor is a favorite of felines.