Hello there. Dogs are not only wise in dealing with wounds. They actually have an instinct of taking care of their health. My observations for a long time to some dogs I see around that have an illness find a way to deal with their sickness. Have you noticed that dogs find grass to eat? I had observed few dogs in the past that shows the same behavior when they get sick. This is also similar to cats. At first, I was so curious as to why they eat, but then I realized that when something is wrong with a dog or cat they find grass and eat it. Cats eat the roots of grass that are freshly uprooted. I observe this when I clean my garden and some of our adopted cats eat them (Well I don't know why cats do this). That's just the cats, I have not seen dogs do the same yet.