You gain the ability to use your Persuasion skill to improve the attitude of a beast. The interaction is treated as a Animal Handling skill check, with Persuasion used instead of Animal Handling. You must be within 30 feet of the creature to use this ability.
Most domestic animals have a starting attitude of indifferent, while most wild animals are unfriendly. (Exceptions exist: trained guard dogs may have an initial reaction of hostile to strangers.)
You may also seek to influence aberations and monsters (including those you have never encountered before) at a –4 penalty. Animal Empathy does not function on vermin, insects, or crustacions.