Are there laws about leaving stool filled diaper on an Alzheimer’s patient in memory care?

Hi- My husband is in assisted living memory care with Alzheimer’s. They haven’t been changing his stool filled diaper. I have been the only one changing him since before Christmas except one aide who changed him once. They just say he’s combative and it’s all their approach. They will go in with three people two grab his arms and the third starts to change him. He thinks he’s being attacked. They are supposed to walk away and reapproach, but now I believe they just keep saying he won’t let them. I’ve heard them changing other people and so many of them are awful yelling at the residents. Then I’m told he could do damage. I think they are afraid. He is only 77 and very sweet almost always but is cranky if he’s full of stool, just woke up or he doesn’t like to change. He’s in Ohio and I just don’t know what to do.