It is probable that the ancestral stock of the Red Sindhi was a principal component of the Zebu cattle brought from medieval India to Sudan over a thousand years ago to form the basis of the Butana breed, but that they are so identical after all this time is very surprising. The Kenana cattle are probably derived from the Butana, they are the same deep red as calves, but turn white when they are adults.
It is likely that the ancestral herd of the Red Sindhi was a primary component of the Zebu cattle introduced from medieval India to Sudan over a thousand years ago to establish the foundation of the Butana breed, but it's astonishing how similar they are after all this time. The Kenana cattle probably originated from the Butana, sharing the same deep red color as calves, which turns white when they mature.