If what you people said are right, then why don't we live with other animals (like wolf, or tiger, or fox) as we live with dog?
There has to be something special. What is that?
Why human chose dog at the first place?
Most likely, nobody chose anything and the ancestral wolf (and cats) and ancient humans just grew towards eachother in some type of convergent evolution, due to win-win relationships.
When humans started using agriculture and building settlements, they started to gather thrash as well (remains of food etc). The ancestral wolves and cats would have been drawn to this. Why go through the trouble of hunting if you can just get some food for free?
In the other direction, this was helpfull for humans as well, as the ancestral wolves are pretty territorial. They would chase other animals away and / or warn the humans of approaching danger by barking etc.
Cats would have been usefull to keep the houses, stockpiles and fields free from mouses, rats, rabbits, etc.
It's not hard to see how humans would have found this usefull. To the point that they would start giving them actual food and not just left overs. And so the symbiotic relationship began.
If you think it through, it's not hard to understand.
You seem to have a tendency to ask a question, look at a superficial answer and then stop thinking about it.
For once, try to go the extra mile.
At this point though, I'ld like to remind you of a few other things that, imo, are more remarkable (yet, still naturally explainable):
- horses for transport
- oxes for transport and farming
- cows for milk and food
- pigeons as a post office
- falcons (and several other birds) for hunting
Cats and dogs, to me, seem a rather obvious convergent evolution. Both have something to gain by co-existing. It's also worthy to note that with cats and dogs, we have a special kind of relationship as opposed to with pigeons, cows, horses, etc...
Cats and dogs are almost seen as family members, as friends, as compagnons. Which is an expected relationship if it grew out of a win-win origin as outlined above.
Whereas the other examples (pigeons, oxes, cows, etc) are seen more as "utilities" then anything else.