VetriScience Laboratories Composure, Calming Formula for Cats, 30 Bite-Sized Chews Composure uses the natural power of colostrum, l-theanine and thiamine to ease nervousness without effecting your cat's personality. Composure is veterinarian formulated and has been approved by our veterinary review board to support behavior issues in cats. Composure soft chews have a tasty, chicken liver flavor that cats love. Composure begins working in 20-30 minutes. Dosing can be doubled or tripled to achieve the desired result. Composure for Cats is safe for long term use. Packaging may vary.