Anyone who has a pet knows that they have feelings and that those feelings can run very deeply.
Nine years ago, I rescued a feral kitten approximately 6 weeks old. She was near death; but, there was still a scrappiness present in her. I nursed her back to health and we have been together ever since.
Since the day I rescued her, she has never known a day without shelter, food, love, playtime, or any other activity that she desires. She acts like any other domestic cat when I am the only human in the house and she can be very aggressive when demanding love from me. She takes her head and gives me very determined "love me" nudges.
However, if a guest comes over, she hides under the couch and will NOT come out for any reason. After all this time, she is still scared that this new person will hurt her.
I have earned her trust over the nine year period; but, obviously the feelings from the abuse still linger.
Animals have feelings, they just can't express themselves like we do.