I don't know about Istanbul but the problem is more like, cats are actively controlled in the U.S. in terms of animal control, spaying, neutering, etc. You don'

I don't know about Istanbul but the problem is more like, cats are actively controlled in the U.S. in terms of animal control, spaying, neutering, etc. You don't really have a proper predator-prey dynamic play out with the population because the predators are more contained than the prey are.