pf2e.fyi
From Pathfinder #152: Legacy of the Lost God, which isn't enabled.

Splendid Companion

FEAT 12
UNCOMMONARCHETYPE
Archetype Animal Trainer
Prerequisites Mature Trained Companion

Your animal companion continues to develop. It becomes a nimble or savage animal companion (your choice), gaining abilities determined by its type. Increase its proficiency rank in Performance to master instead of Athletics or Acrobatics.

Pathfinder #152: Legacy of the Lost GodOGL