My mom has moved into a care facility and one of the residents has brought her dog with her, however my mom keeps thinking the dog is hers and it's causing so much turmoil between the owner of the dog and my mom. They keep getting angry with each other. My mom hates this lady now and I don't know how to solve it. I've explained over and over to my mom but with the dementia she forgets everything I've said within minutes and the whole thing starts again. I don't know what to do for the best.