English: “A dog shall not whet its tongue” — therefore the Torah said regarding a treifah animal (in Mishpatim), “You shall throw it to the dog,” to teach you that the Holy One, blessed be He, does not withhold the reward of any creature.
On the daf / in context: See the cited source for the full section.
Type of Learning
Derash on the verse (midrash) — not a formal named middah of the 13. Measure-for-measure reward.
What Is Learned
Because the dogs did not bark against Yisrael, the Torah assigns them the treifah animal as their due; Hashem does not withhold the reward of any creature.