This is comparing apples(humans) to oranges(pets). You are saying that a being you can't possibly understand because it is different is less than a stranger than someone who you can understand and communicate to. Do you not see the disconnect or are we really that doom.
If we benefit humans lives it will in turn rise the tide for pets and animals as well, but until we can show unconditional compassion for our own species what right do we have to give to any others?