HolistaPet Calming Melatonin Soft Chews are a natural way to keep your dog calm, cool, and collected. Each heart-shaped chew contains melatonin, a naturally occurring hormone that helps regulate sleep. Our chews also contain a proprietary blend of theanine, chamomile, passion flower, ashwagandha, tryptophan, valerian root, and several other naturally calming ingredients to ease your pup’s anxiousness and relax their mind and body.