Crazy is a strong word, . Socially inept might be better.

"Oh, that's easy" She bounces on the balls of her feet, jarring the cat a little who looks peeved for a moment then settles in her arms again. "They whisper to you. The dead can talk through dreams and other means if they're clever. My cat was very clever. He wanted to stay and I knew that. So I was able to find him and keep him again."