This may sound really bad.....but here it goes....Hubby knew you had horses. If he expected YOU to change he is WRONG. He can either get over it and understand that you have always and will always have and/or love horses, or can get gone.
My husband knew from the moment he met me that horses are part of my soul. We had a few moments in the beginning of "you need to get rid of them" "they cost to much money" "they take to much of your time". I left. He found out real quick that horses are #1 in my life. My horses and my students come first. Point Blank! And now that I have a daughter, its my daughter, horses and my students. I love my husband, but I refuse to change who I am to make him feel better about himself. End of discussion.
My husband finally caved and said "your right honey". He occassionally throws small temper tantrums, but he gets over it. I told him a long time ago that if he didnt want to do the horse thing with me he should find his own hobby. He chose Nascar.
Counseling may be an option for you both. But I think you just need to look at him and say point blank "You knew this about me when you met me. If your intent was to change me, your being selfish and quite frankly stupid. Get over yourself. You have your hobby, let me have mine. If you dont like it, there's the door!"
I know, I know. Easier said then done. But in the end, if you dont stand up for yourself, who will???