K9-Defence offers nutritional support for your dog’s immune system. This supplement is rich in antioxidants that neutralise free radicals, and also provides Echinacea and Astragalus, herbs that help your dog adapt to physical and mental stress. K9-Defence also contains mannan-oligosaccharides (Bio-Mos®), a prebiotic which supports the body's defences against ingested toxins, and Linseed which is high in Omega-3 that is well known for its health benefiting properties. K9-Defence is best fed as a short-term boost to dogs that have been a bit run down.