Cobber Working Dog PERFECTLY BALANCED TO MAXIMISE THE PERFORMANCE OF YOUR WORKING DOG TEAM.Cobber has been working with Australian farmers for over a quarter of a century and understands that what you put into your working dogs determines what you get out of them. When in work, an Australian working dog can run the equivalent of a marathon and in a climate that is one of the toughest in the world. Cobber has formulated a complete feed specifically for them to ensure they remain in peak condition and fitness day in, day out.