Pheromones do what?

This is perhaps not terribly egregious, but it still bothers me:

"I am a vocational rehabilitation counselor and one of my clients informed me that because she has polycystic ovarian syndrome, she puts off pheromones, which attract deer, rats and dogs. Is that a remote possibility?"

The way it is written, it appears that all pheromones attract deer, rats and dogs. S/he should remove the comma after pheromones and change the which to that. [It would also be more clear to say "certain pheromones," but okay okay, I'll stop.]