OK, I reduced Scent to:
Heightened Smell: Animus have a better sense of smell than humans, and are more often able ti distinguish humans by scent than by sight. As a feat, Animus with a Wis of 11 or higher can take Scent. This feat lets Animus detect approaching enemies, sniff out hidden foes, and track by sense of smell. For more on Scent see page 314 of the MM.

This should balance them more for +0 LA. See the Article for the full entry. Also editing the post from 9/17 with modification.