The end came with the advent of Islam which not only suppressed the native religions, but prohibited the representation of any living creature. Deprived of their subject matter, the rock artists ceased to paint. Towards the end of the period, the quality of the horses and dromedarys degraded and the subject matter changed. The riders became warriors wearing large feathers on their heads and armed with short spears. The animal's tails and their bridles are depicted with studded with spikes along their length.
Cattle are still quite common, but they are more and more stylized.
At the very end of the period the animals became completely stylized. Dromedarys, cattle, and horses appear much like large toothed combs. Rock Art in Chad Now Extinct Today, bored young shepherds still draw stylized animals on the same walls their ancestors did, but they now use animal dung instead of paints. Rock art is now, by any real standards, totally extinct in Chad. Rock Art Rock Art Location Much of the rock art in Chad is found in the Ennedi hills in north-eastern Chad.