Dog bad breath remedies. Using a dog bad breath home remedy is not always the best way of dealing with the problem. However, with some persistence the use of home remedies may reduce the problem to a tolerable level. Given below are some common home remedies for dog bad breath: 1  Brush your dog’s teeth more often, using a toothbrush and toothpaste of good quality. 2  Allow your dog to chew on a clean and hard bone, on a few occasions. 3  Add one mini carrot to your dog’s daily diet.