Goblins don’t use animal labor. If they want something transported they either pull the cart themselves or think of some nifty magicky/steampunky way of moving it.
Page 25 panel 1
(The next day. Shot of a very narrow crack, just big enough to sidle through)
Teo: (off camera) This is it…
Teo: Fat Man’s Pass.
Alexey: That’s… aptly named.
Niki: How are we supposed to get through there?
Lysander: If we hold our things out to the side and go through sideways–
Niki: That might work for you bipeds, but how are Tulip and I going to get through?
Lysander: Well, erm…