So a squirt and a steam bull are now hanging around my Bastion after acing the machete and shield challenges (I think). I can interact with both of them, petting the squirt and rotating the steam bull. The sound effects seem to indicate that something has happened as a result, but I can't puzzle out what. Did I miss something, or should I just not worry about it? Thanks!

No, you are just bothering squirt and the bull just turns around the noise you hear is him spinning around.

Thanks!

Stop being mean to the squirt. >:(

give the little guy a break

SPOILERS: 
 
 
They help you out towards the end of the game when you need to defend the Bastion from the Ura.

Aha! Thanks!