Ketchum’s tattoo ink for animals gives you the means to permanently and positively identify your swine with a highly legible tattoo marking.. Tattoos are the best solution available as a back-up solution in the event that a livestock tag is lost. It also can be extremely difficult to identify your animals that are the same breed, which is why tattooing your animals helps prevent confusion between the livestock. Animal husbandry best practices recommend redundant identification methods for this very reason – and a good way to go about that is to use both tattooing and livestock tagging. One of the most effective methods utilized includes a numeral system to organize and be able to separate livestock. Comes in 2 oz. roll-on bottles in either Black or Green colors.