I always found that that sticking my grotty dirty fingers in there mouth stops it quite quickly.
I would have a chat with your vet and have bloods run just to give her the once over. I would also consider that she could have ulcers, so may need scoping. She could possibly be a little hormonal too. Good luck!
I have used a product called crib no more. Cheap and smells awful but I put it on things my nibbled tends to chew. Within a week he stopped completely.
Cause and effect. Bite-> pop her in the mouth or pinch lip. Non of my studs, geldings and mare are allowed to be aggressive in any way
In hand work. When she is mouthy, she moves her feet. A lot! Then, let her stand and rest quietly next to you. Get near her face. If she is mouthy again, she moves her feet again. Keep repeating until she associates mouthiness with work.
Hi i had a problem with my mini and what I did was just stand next to them and if she asked for treats or bites just ignore it but if she respects you or does something you like give her a treat
I work at a quarter horse breeding farm. Day old foals even are never allowed to get away with biting or kicking. Any kind of that behavior is quickly punished and then we all move on. You have to react in the moment though, otherwise it will never sink in. There are some that are just tougher though. Your mare is older, but she can still be trained. My older mini who was an orphan still tried after I first got her, but she wasn't as bad as when she first came. Lots of groundwork, make her respect you and your space, that's what I did and she got over it eventually. Good luck!
Make the bad things hard and the good things easy!
Stop spoiling and treat her like horse until it has respect. Consistent correction and training on behavior is huge. You can have fun with them after they learn the basics ! If your not consistent , don’t expect them to get it!
Whenever she dose something you dislike make her work harder thus showing her that by misbehaving she will work harder than just doing as you ask and not putting up a fit.