LBK is deaf. She wasn't when she moved in, but she has become so in the years since. It's pretty funny to demonstrate her lack of hearing. John will clap his hands loudly behind her head and ...nothing.. I am still in awe of the sweet trusting cat that she is. She lets me give her sink baths and purrs through the whole thing. Last night I found a shortcut... She has no idea that there is any sound to this treatment.