Earth Animal Calming USA Chicken Jerky Dog Treats, 8 Ounces (3 Pack) Pack of 3 Earth Animal Calm Treats 8oz Packages Raised without Antibiotics, Artificial Growth Hormones or Steroids Humanely Raised Free Range Chicken & Safely Sourced NO Wheat, Corn or Soy & Grain Free Brushed with Vitamin E and L -Tryptophan, an amino acid that supports increased serotonin levels. This helps quiet stress and anxiety. Helps to keep your dog happy, peaceful and calm!