I had a word of mouth agreement at 16yrs old for my mare who I had bought when I was 7 yrs old, with the same man who trained me into 4ft jumpers at 10yrs old, beating adults, and helped my dad buy her for me before my dad passed away.
Cue 16yr old stupid teenager me, ya you can use her for lessons and I got free board for it. He ran her into the ground, her leg bowed up, he put her in a field because he could not use her, then the vet STILL charged me for the bill, when I did not even call the vet, nor was I apprised of the injury when it happened, I found out from other barn people! I wanted her out asap and at my friends moms place to rest and rehab. The rat bastard PUT HER IN A STALL, LOCK ON THE STALL DOOR, AND TOOK 16 YR OLD ME TO COURT FOR ABOUT 4MO BOARD OF $450/MO, even though he left her outdoors and bowed up for 2 or 3 months of it according to others at the barn that told me all this after I got her out of there, after paying a stupid amount of money with my less than one yr old son, (again yes, stupid 16yr old me) and getting stuck with the 350.00 vet bill that I had no say in calling and there was no real treatment or anything.
Saying all that to say, barn owners can be d!cks and do alot to keep a horse on their property. Looking back I prol shouldve cut the bolt on the lock and just left with her on foot and risked it, my friends moms was only a few miles down the road and they couldve met me w the trailer, ugh.
OP get your horses out!!! And take photos of them every time you are there to document god forbid one gets hurt or sick before you get them out of there!! All the best to you!