> But idk how to enforce good dog and cat ownership?

We have laws against animal abuse. Some of these laws have strong teeth and can put abusers behind bars for years.

I have two dogs, and they're both incredibly happy. They enrich my life, and I do the same to theirs'. I don't want the state telling me I can't have dogs. That's a kind of liberal fascism that goes against the grain of this country's ethos.

There are dogs suffering in shelters, but there is suffering all around, everywhere you look. Orphan children, homeless people, cancer. If you start passing laws against everything, we'll wind up living in a bubble.

Find negative externalities and tax them if you want a better way of dealing with problems. Don't ban dog ownership.