Currently if Invisible and attempting to use Animal Empathy on a creature, the attempt fails and a console messages states: "The creature must be aware of you to use that ability"
This is fitting and thematic. However the same above interaction occured even if the animal is actively attacking the player attempting to use Animal empathy.
I may expect the message to say something different, or the animal empathy attempt to execute the roll because the attacking animal is infact aware of the invisible player.