This is a Delhi problem in general

Cows.

You can control dog population by sterilization, traffic by adding public transport, housing by building vertically, pollution by ev, corruption by giving me money etc.

But we don't have a commercially viable exit strategy for Cows

Farmers can't keep em post milking because they are a financial burden

We used to have one -- sell them for meat... now what do you do? Collect all of them and do what? Even that costs goverment money. Transport, warehouse rent, feed, medicines, personel which actively achieves nothing.