Don't block the doorway Rex!
Rex - I'm trying to be stealthy! Sit! Stop barking and running in like mad towards those Deathclaws! SIT!
Bad dog!
Rex! You're blocking the doorway again! It's Fallout 1 Dogmeat all over again! Except this is 2010!
Rex! Don't attack those Cazadors Rex... REX! Heel! HEEL!
Rex! Why are you attacking Veronica?? She's our friend! Bad Dog!
Rex, why have you suddenly disappeared entirely from the game?
BAD DOG!