Purina Pro Plan Veterinary Supplements Calming Care for Dogs contains a strain of beneficial bacteria shown to help dogs maintain calm behavior. 

Benefits of Purina Calming Care Canine Probiotic Supplement:

• Proprietary use of probiotic strain BL999 to help dogs maintain calm behavior
• Helps support dogs with anxious behaviors such as excessive vocalization, jumping, pacing, and spinning
• Helps dogs cope with external stressors like separation, unfamiliar visitors, novel sounds, or changes in routine and location
• Helps dogs maintain positive cardiac activity during stressful event
• Veterinarian recommended and safe to use
• 30 packets in each box