Purina Pro Plan Veterinary Supplements Calming Care contains a strain of beneficial bacteria shown to help cats maintain calm behavior. The science behind Purina's therapeutic products represents a collaboration among Purina nutritionists, researchers and veterinarians. Features: -Proprietary use of probiotic strain BL999 to help cats maintain calm behavior -Improvement shown in cats displaying anxious behaviors such as pacing -Helps promote positive behaviors such as playing and seeking out social contact -Helps cats cope with changes in routine and location and helps reduce sneezing associated with herpes virus -Helps blunt cortisol, a marker of stress, and supports a healthy immune system Active Ingredients per sachet (1g): Bifidobacterium longum BL999 1x109 CFU, Vitamin E 100 IU Inactive Ingredients: Liver flavor, maltodextrin. Made in USA