>>5230590Producer-D is capable of monodirectional movement, choosing a direction randomly when it is created then moving a tile in that direction every five turns. It cannot change direction while it lives.
A Producer-D that isn't eaten soon enough after it's creation may often end up travelling quite far into the unpopulated reaches of the MAP, while leaving a long trail of food pellets behind. Due to this, Herbivores 1.0 and 1.01 have no problem following these "escaping" Producer-Ds, while the pellet-averse Herbivores 1.01m will typically not make it very far.