1) One of his parents would have to have rabicano for him to have it. Csimkuna, do you know what his parents looked like?
2) Rabicano is on the barrel and flanks of the horse, not the shoulder. I do know of a very rabicano Arab and he looks nothing like Rodeo.
I do!! His dam is a chestnut overo as well....
Heres a picture of her
And his sire is a chestnut, TB....
Heres a pic of him
In the picture of her grazing....it looks like she has the same thing that Rodeo has going on towards her flanks....might just be me though.