I originally wrote this as a comment to another post. But I thought making this a post will be better.

I was watching a video about the street dog issue in India and it talked about a metric called "Food capacity of a street".

If the food capacity of a street is high, more street dogs will survive in that street and reproduce and create more street dogs.

If the food capacity of a street is low, less street dogs will survive in that street and reproduce less and the problem kind of solves itself.

We don't have to deal with the street dog problem directly. We don't have to kill them or anything. If we stop dumping trash on the street & if we stop feeding them, the street dog menace will sort itself out in a humane way, in just a few years time.

Killing the dogs won't solve the problem because:

1. You cannot totally kill every single dog in the city. It's practically impossible. Some will definitely survive and they will reproduce.
2. If we somehow manages to kill all the street dogs in the city, dogs from other cities/villages/towns will come and live here. They won't have any competition for food or area, they will settle in and reproduce.
3. A lot of the dogs on the street are not stray dogs. Some of them were actually pet animals left behind by their owners. Those animals will eat the garbage and reproduce and create a fresh batch of stray dogs. Even if we eradicate all the street dogs in the city, this will continue to happen and create more stray dogs.
4. Killing soooo many animals at once is bad for the planet. Their bodies will decompose and release greenhouse gases. Not letting them to be born in the first place is a better solution.
   

If you want to capture these dogs and put them in the shelter instead, the same problems from 1-3 will still apply.