OP do you really CARE what the BO thinks or says? Look at her as amusement, tell her you’re leaving and why. I would be sure you can move your horse the same day to the new barn. I don’t get it, just tell her. She is already pouty, childish and throws tantrums, so what do you think she’ll do differently? She doesn’t care for your feelings, so don’t care for hers. And if there is no contract, I don’t care what the standard for the industry is, I don’t care how small the horse world is, there is nothing holding you there or making you give 30 days notice. Whatever she is going to say she is going to say, regardless if correct or lies.
If you want to leave, leave, you can, you are allowed. It is a business, she sucks, go to a better place where you are treated professionally. If you did sign a contract, then you are obligated to stay 30 days or leave but still pay the 30 days.
This coming from a BO that has boarders always give 30 days as it’s in the contract, and stay the 30 days and we’re all still friends. Though most leave because they move out of state, bought their own farm or sold their horses or changed disciplines, which I understand. We’re a trail riding barn with a small outdoor arena and round pen, and that doesn’t work for someone who wants to venture into dressage or jumping.
The horses are fat and very happy and so are the boarders as far as I know. I don’t tolerate drama for one minute and will gladly ask the disruptive boarder to leave, but usually just having a conversation with a boarder about the issues can usually resolve into attitude changes and they begin to play well with others, or leave. Which are the only two choices anyway