The animals seem to have interbred very little with other types of cattle and remain almost a throwback species.
Many surviving populations are believed to have interbred with feral or domestic water buffalos.
Tryon then interbred the maze-bright rats with other maze-brights, and maze-dull rats with other maze-dulls.
They readily interbred and produced a 12,000 strong herd by 1934.
They reproduced with eggs, but interbred with animals to produce ape-like human ancestors.
This suggests that the two populations interbred and produced fertile offspring.
The two species have been interbred in captivity, resulting in offspring with reduced fertility (but not sterility).
The authors of one of these studies concluded that these species have not interbred for between 3 million and 12 million years.
