@FourOh-LLC @grillchen @kaia @BowsacNoodle @MelGibsonafter4Beers Dogs, cats, horses, and oxen all simply shared the truth of being helpful for humans to keep around. In turn the animals stayed with humans because we offered them food and shelter.
Dogs and Cats are the descendents of the working creatures we tamed for work. That we keep them as pets nowadays despite the lessened need for their jobs is simply because our descendents took them as pets before us, and their descendents before them. We know they are animals compatible with human companionship and give it to them because they are cute.
Horses and Oxen too to a lesser degree as well, but they're not as cute or efficient to keep around as the smaller animals who have become the staple pet.