This is Chase170.
ATU0005 biting the foot
ATU1530 holding up the rock
K0543 biting the foot
K1251 holding up the rock
Theal's Lion and Little Jackal has identical plot
Klipple has more examples of 1530: 3 in a cave, 8 with rocks; jackal hare, or Hlakayana are the tricksters while lion, leopard, and hyena are the dupes
additional references in Arewa and Mofokeng
conclusion "The frequency of tales in Africa having these two episodes following in this sequence would seem to point to a direct African source for this particular tale."