Too late, the True Christians™ have given the Biblical Answers so I'll give the secular ones according to the natural law also knows as
ius naturale.
With a perfect symmetry you can keep just the rights wich you can respect in the others according the corresponding obligations. Life, liberty and private property are the only wich can pass the symmetry test. A convict, for example, loses his rights in the measure that has transgressed it in a the victim/s, whenever it is possible, of course.
Can a lion respect my life?
Can an alligator in my backyard respect my liberty?
Can a monkey in my kitchen respect my private property?
Nonsenses. If some day the animals can understand what is the concept of rights/obligations, drive a car, shot with rifle or gun, write a book, paint a picture, play piano and ask for the suffrage for them perhaps, and only perhaps, I'd give them a try.
Meanwhile the animals are properties and, under this awesome right, can be protected and better than with socialists laws. Try to poison my dog and, suddenly, you will weigh a few ounces more. Depending of the size of the nearest bullets.
What happen if i see a neighbor killing his own dog with cruelty? It is not my dog and not my problem. Of course i am free to stop going to his shop or to do not shake his hand. But i must respect his right to have private property and use it under his own wishes because i have another property and i want to be respected by others.
Animal abuse does not exists, it is just use. And the animals do not have honor or dignity because they do not know what it is...
...Wait, the socialists neither.