Just wanted to say I was going to post a similar post, but glad you saved me the typing. Cats digestive and immune systems allow them to kill and eat vermin that would be infectious/indigestible to other animals. Recently some breeds of dogs have been bred as mousers, but cat’s have served in their own way (or I dare say we wouldn’t have domesticated them either).
On an odd note (for anyone and everyone), I felt a funny feeling that I should bring up the point, that in the event of a meltdown, don’t let your dogs run free. They can quickly become a feral pack, as described in the novel “Light’s Out,” and I have heard of that problem in some cities as people let their dogs go when they can’t feed them. We had a dog, with a collar, but very skinny attack some goats out here on our property. I suspect someone turned him/her lose, as we’re a few miles out from the big town, and people are known to do that with their cats. Just a plea!
We’ve got feral dog packs in the forest preserves in Chicago, from time to time. Usually, they don’t survive the winter, so they aren’t a big problem. A few years ago, near the ghetto, a pack of pit bulls formed in one of the preserves, and killed a jogger. So, yes, dogs will go feral very quickly, and just like other wild dogs, they might even have a go at a human.