Yup!
BTW: What does a cat whisperer do anyway? I assume you don't actually whisper to cats. We hired a pet sitter once that claimed she was a pet telepathic and could read pet minds and tell you what they were thinking. Is it anything like that? She didn't actually whisper at the cats, she just kept telling them she honored them, to which the female cat responded, "Great, honer me with some chicken already?" Not whispering it either. This women also offered to do pet reiki as well.
She was a rather strange bird but the cats seemed to like her well enough... and cats have a way of being able to sense people IME anyway. Only problem was she didn't actually clean the litter box which was the reason we hired her in the first place, so we had to find somebody else. Unfortunately, we found professional pet sitters to be rather strange and unreliable and ended up just hiring a local neighborhood kid which always worked out better.