Sweetheart, please just let this go and die out.
No good can come from pursuing this.
Obviously, the person who made the comment was a clod. Now that you understand this, it would be best to treat this individual in a cool and professional manner.
It would be heaven on earth to be surrounded by kind people who know when NOT to make a stupid comment. However, heaven, with all of its divine justice, is for later. For now, just let this drop. The unemployment rates are way too high, and many companies are just looking for an excuse to cut the work force.
Do not give your employers the excuse that you are "overly sensitive" or "like animals more than people" or "can't get along with her co-workers."
The rat race is over, and sometimes the rats win. But there is eventual justice, and that has to be enough.
Vent to us, pray to God, and go on to the next battle in your life. We know how you feel. They know how you feel. And we all know there is no cure for stupidity.
Now, just move on, with grace and wit and knowing how much we all love you. You need to save your energy and focus on other and more important things.