Slavery in all its forms, including ownership of any animal, is outlawed, just as the ownership of humans is outlawed in today's society. It also happens that humans in this society are healthier and live longer. They are fed growth hormones so that they grow unnaturally fast and fat. In most cases only a few animals are selected to bear offspring. There is no opportunity to do anything but follow a fore-ordained course from birth to the dinner plate.
Fish are nearly extinct in the oceans as the result of overfishing.
Finally, imagine that you are sentient being and that you have an equal chance of being either a human, cow, lamb, pig, chicken, turkey, or fish. Whenever I hear anyone arguing for slavery, I feel a strong impulse to see it tried on him personally. This is a cookie free zone. We don't take your name or location or ask you where you've been or where you're going.