Home » COMPOSURE™ PRO COMPOSURE™ PRO Supports calm behaviour and brain health in cats and dogs. COMPOSURE™ PRO is recommended for behavioural, cognitive, and brain function support, as well as supporting sleep efficiency. ACTIVE INGREDIENTS PER CHEW Thiamine (Vitamin B1) 100 mg L-Tryptophan 75 mg Colostrum Calming Complex® 25 mg Suntheanine® L-Theanine 25 mg CONTACT US Grey Wolf Animal Health is proud to be the Canadian distributor of VetriSCIENCE® Pro Line.