Vetoquinol Zylkene Calming Support Supplement for Small Dogs and Cats, Helps Promote Relaxation and Reduce External Stress Factors, Daily Behavioral Support and Anxiety Relief for Dogs and Cats, 75mgHelp Your Pet Cope With External Stress Zylkene helps your pet cope with changes in their daily routine, such as travel, celebrations, vet visits, home alone, boarding, loud noises, and more Alpha Casozephine A naturally occurring milk protein found in cow's milk that helps promote calming effects in your pet without drowsiness or other side effects found in other calming chews for dogs Lactose Free and Easy on Sensitive Stomachs Zylkene's dog calming