This. Keep it short, polite and concise. If you offer or even make up reasons, those are just elements she can argue with you on.
Example: if you say “your horses are too destructive” she can counter by offering to pay for the wear & tear they cause or worse, point out if any broken planks or holes pawed by other boarder horses. You don’t want to get into this with her. She might dig her heels in just to aggravate you.
She has only been here 6 months, so that should make the confrontation easier. Approach her face to face (just you and her - no one else!) with a written notice in hand. Keep calm, channel your inner HR representative and act like a business owner. Tell her that it is just not working out, she is not a good fit with your horse management style. Hand her a 30 day notice ( or 2 week - whatever you think is fair). Allow her to fume and fuss. Hold your tongue. Since you say she loves drama she might throw a fit and demand to know why. Become a broken record and repeat “its not working out.” Suggest a few other places that might work out better. then walk away.
Hopefully after this conversation she moves sooner rather than later. If she is of weak character she might try to bad mouth you locally, but people of this ilk always show their ass and word of their craziness will get around the local horse community soon enough. You’ll be glad to be rid of her.
Sorry that you got a crazy boarder. Take it as a learning opportunity to screen future applicants a little bit harder, but please don’t let it put you off of boarding altogether. It sounds like your other 2 boarders are great, so take solace that not all boarders are nuts. Most are super grateful to have a safe place to keep their horse.
