Pets

Any animal kept as a companion, usually in or around one's home, typically domesticated and cared for attentively and often affectionately. — The Collaborative International Dictionary of English

a domesticated animal kept for companionship or amusement — Wordnet

These are animals, or more frequently animal-based constructs, that are cooperating with humans. They may or may not be sentient (i.e. type vi constructs: anthros). Sometimes it's hard to tell.