I can't quite see why this qualifies as being worthy of the angry-mob-with-pitchforks-and-flaming-torches approach. Most decent mock rock (there are exceptions I agree) looks pretty good to me, especially when weathered in - and should a conservation charity be spending astronomical sums (in cash and environmental terms) on sourcing, transporting and placing real rocks for cheetahs that won't know the difference anyway? Perhaps I'm just a philistine who's actually pretty indifferent to rock quality at the end of the day
Dick Emery had the answer all along - "You´re awful but I like you".Cheetahs probably couldn´t give a damn about the colour and so on of the rocks as long as they are a couple of metres above the surrounding landscape.
I think you will find Cheetahs are very touchy when it comes to rock colours it looks a bit better now its coloured. At least its a bit of enrichment for them.