If your dog does not have any teeth or if they're missing some, it is easy to feed them soft kibble by adding water to soften the hard, crunchy food. Pour some hot water or chicken or beef broth to your dog's favorite kibble and allow it to sit for a few minutes. This will cause their food to taste better and be more enjoyable. One other method when it comes to feeding a senior dog is to simply give them canned or wet food.