Vet’s Best Seasonal Allergy Soft Chews help address skin-related issues associated with your dog's seasonal allergies. A vet-formulated blend of natural key ingredients in each once-a-day soft chew supports normal histamine levels and skin moisture. The OptiLife3™ Formula provides antioxidants and prebiotics to support healthy immune and digestive systems, and reduce the effect of normal environmental stress. Our chews are extra moist, great-tasting, and made for optimal absorption. Made in the USA with quality US and globally sourced ingredients.