Is this ok to feed a dog?

My staffie is very picky about his meal, I've been changing his food from Science Diet to Blue Buffalo, since I heard it's a healthier brand. But he seem to refuse it alot until I tried pouring some beef stew broth into his food bowl and mixed it with the Blue Buffalo dry food. He ate almsot the whole bowl, so my question is should I keep trying to do this method or is there any other method out there to keep him eating his dog food?