Animals don't have any use for our human rules, and unless obedience equals food they won't always heel and obey like a good pet- because their wild side tells them they can do whatever they want and they'll get away with it.
It doesn't matter how long we spend training them, yelling at them or trying to convince them we're their masters, our pets are gonna do whatever the hell they wanna do whenever the hell they want to- and boy are they ever gonna rub it in.
And when they finally decide to wholesale take our homes from us and turn us into their pets things are going to get really weird, as our new masters take to standing on tables and barking orders.
("I sent my dog outside as punishment for standing on the dining room table, this was his response"-Image Link)
See 10+ Badass Animals Who Don't Care About Your Stupid Rules here