Vetoquinol Zylkene Behavior Support Capsules for Dogs & Cats, 225mg - Calming Natural Milk Protein Supplement - Help Pets Cope with Change & Noise-Related Stress - Non-Drowsy - Lactose-Free Non-drowsy nutritional supplement to help manage pet behavior problems; helps promote sense of calm Helps support pets stressed over fireworks, thunderstorms, grooming, vet visits & changes at home Suitable for dogs & cats, ideal for pets with sensitive stomachs; safe for short & long-term use Zylkene contains a calming natural milk protein that is lactose-free & simple to administer daily Trusted US pet food supplement brand with NASC Quality Seal, devoted to animal health since 1935