Our dogs' diversity can be traced back to the Stone Age

Should be noted that wild cats (felis silvestris, felis lybica, felis catus) are not "apex" predators based on hunting success or being obligate carnivores. It's a common misconception that cats were apex predators when they were domesticated. They are both predator and prey, firmly in the middle of the food chain, and as such have the instincts of both. "Apex predator" would mean taking down large animals like elk, which would obviously be ridiculous for a small cat unless the prey is literally immobile.

Wolves are, though.