Don't be a tool.
They are indeed the Space Men, beloved of the Golden Emperor, Long May He Wag.
They're actually goggle-eyed, hunched-over, hairless abominations. Their long, snouted skulls, broad powerful chests, and floppy triangular ears bely their noble Canine heritage, yet they move about on two feet instead of four and excepting their sharp frontal canine teeth they have a jaw lined with flat grinding molars. They also have long, multi-jointed paws ill-suited to sprinting and digging.
They are also exceptionally stupid and will spend their time gorging themselves on meat, drinking until they vomit, and awkwardly licking their genitals until directed at combat.
The Golden Emperor, Blessed Be His Chewtoy, loves them as he loves all his subjects, and sees that they're used well in the defense of His Noble Backyard.
The Space Men are savage and easily confused, yet faithful to the last in the execution of their duties.