He does his best.  Sweetboy is a gentle soul who wants to help with everything, including things he can't.  His inquisitive mind watches everything his handler and other tokotas do, learning quickly good habits and bad.  His gentleness has made him an easy tokota to bring on caravans carrying good across the harsh hot terrain, but he himself can only bear the weight of his own body.  His handler, recognizing the tokota's eagerness, made him a saddle of mostly fabric so the tokota can feel like he's pitching in.  What he doesn't understand is his positivity, drive, and emotional support keeps the caravan lighthearted across the grim landscapes and harsh weather.