An inkjet color ink comprising: an aqueous medium; at least one yellow dye having a \u03bbmax of from 390 nm to 470 nm and an II ratio of an absorbance I at \u03bbmax+70 nm to an absorbance I at \u03bbmax of not more than 0. The large animal exercising device includes a hoof abrasion system and treadmill cleaning or flushing system. The enhancement device includes a compression body with a front of the body having semi-circular convex surface.