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.