There's still the matter of the effectiveness of their camouflage, given their lifestyle and the exact forest conditions. There are a lot of colors to work with here, after all. It would help to specify how, where, and when they sleep, to determine how well-matched their camouflage needs to be under present conditions. (see earlier description on Page 1)
Being mainly nocturnal is likely but not definite, based on its cave-dwelling ancestor, echolocation, and no notes of it changing activity patterns, although its more recent ancestor, the Duohorn Bounder, having an image showing it out in the open where there's strong sunlight strongly suggests it's diurnal to some degree.
If its predators have sharp contrast or color vision, that would also increase the need for particularly well-matched camouflage, unless it has some measure to compensate, such as having guards keep watch over the herd and waking up and fleeing quickly.