Interesting tidbit: It's unlikely that dogs or cats would be able to pick their owner out of a lineup based on looks. There have been studies done that suggest both cats and dogs use their sense of smell to recognise individuals and their ability to tell the difference between individuals based on small differences in appearance, which is how we do it, is minimal or nonexistent. Of course they would know mommy has long hair and daddy has short hair, for example, but given the same basic characteristics they wouldn't be able to tell one person from another on looks alone. On the other hand, this is an ability sheep seem to possess
I think the vast majority of animals recognise their owners. My bird does and will bite pretty much anyone else who so much as dares to stick their hand in his territory. My oscar can tell the difference between me, my mom, and my dad. He gets excited when I open the cabinet to get food out, but no other time. Whenever he sees dad he freaks out, because dad ALWAYS feeds him, and he doesn't respond to my mother at all.
Animals that form a pair bond for any length of time are more likely to be able to recognise individuals than other animals, as they have to be able to pick out their mate from others. Same goes for animals that care for their young, so they can tell their own offspring apart from others they don't want to raise.