Quote Originally Posted by Elkad View Post
Sure. Tiny Familiar blocks small or medium barbarian. Large barbarian overruns it.
Just don't pick a bat or toad and you are good vs a half-orc or other normal-sized race.

If he's large, you'll have to blow a feat for a blink dog or something I guess.
Octopi are valid familiars according to stormwrack, and are small, so they can block large creatures.