The Dogon tribe in Africa is known for sculptures with horses, where do (did) these horses come from ?

Question

I don't know any horse breed living in west-africa (Mali) , neither do I see any saddles etc.. from Dogon or a modern Dogon horseman ?!
There is a lot talking about their mythology but let start explaining simple observations like the Dogon horsmen sculptures.

Answer 1

Actually their art is not only horses and horsemen.
Themes found throughout Dogon sculpture consist of figures with raised arms, superimposed bearded figures, horsemen, stools with caryatids, women with children, figures covering their faces, women grinding millet, women bearings vessels on their heads, donkeys bearing cups, musicians, dogs, quadrupled-shaped troughs or benches, figures bending from the waist, mirror-images, aproned figures, and standing figures. (Laude, 46-52) Signs of other contacts and origins are evident in Dogon art. The Dogon people were not the first inhabitants of the cliffs of Bandiagara. Influence from Tellem art is evident in Dogon art because of its rectilinear designs.
The Dogon are an ethnic group located mainly in the administrative districts of Bandiagara and Douentza in Mali, West Africa. Very close to the borders of Algeria.
They are very close to the above-Sahara cultures such as the Berber, Arab, Egypt, Alger, Tuareg etc. All the above cultures had and still have a strong relation with horses. It is almost impossible for a tribe (such as the Dogon) that lived and still lives so close to the above cultures not to have came in contact and get influenced too!
Nothing unexplained! Sorry!
(correct also the above answer about the distribution of horses)

Answer 2

Horses have been around all over from prehistoric times on, in Egypt as long as the 15th century BC, as noted in the link below, which shows the history of the domestication of the horse. Therefore, I can see that with the travels of the Egyptian peoples, this idea could easily have spread to the Dogon. Check the link for more on the history of the horse & saddle.