Purrley, I wouldn't worry about the dog food. I discussed this one time with my vet, and he said it was a good thing that the dog lets the cats eat from her food other than getting all posessive. My cat food has much more calories and proteins than the dog food, so I don't worry about it. What I worry about, is that the dog eats the cat food! And she's having problems with her weight already at 6 months age!

Vinegar helped just like Bitter Apple in our household, especially where Rudie started to scratch at the wallpaper. He stopped doing this.