"They look like dog-people, only... big."
Lachance, regarding dead dog-aliens

The dog-aliens were a race of aliens first discovered inside one of their ships on LV-178. It is likely that the species might have been wiped out by the Xenomorphs due to the dog-aliens' harvesting of Xenomorph Ovomorphs. Their abandoned ruins indicate the race to be thousands if not millions of years older than that of the human race.

See Also