Is it ok to feed a dog cat food?

My dog will not eat her dry dog food unless I am watching over her. She would rather steal food from the cats dish. Is it ok to feed a dog cat food? All dogs seem to like it better than dog food. I have bought different brands of food but she still does not want to eat it. She wouldent even eat Nutro (the best brand you can buy) I dont want to feed her any thing cheap that has corn as the main ingredient. I dont want to feed her canned dog food because she has long white hair will get it all over herself. Any suggestions?