This is how being tasty and easy to catch can lead to enormous reproductive success, plentiful free food, and access to advanced medicines, also free! Cats, who chose a different route, get the reverse if that, being spayed as a norm, getting their nature's KPI much lower than chickens' or even cows'. Oh wait...

Seriously, you can see it as an evolutionary trap of specialization, getting into a deep (local) maximum without a feasible way out, should circumstances change.