Charlie uses a litterbox and at 6 months decided he didn't want to use it anymore. I started giving him treats again when he went in the box and kenneling him again at night and when I couldn't be with him and he got better and now he's back to having more freedom in the house. He is still having more accidents then he used to but it has gotten much better. Have you tried putting the litter box in the bathroom? Maybe she wants more privacy or something. I don't know what to tell you about the barking, Charlie isn't a barker. Good luck!