Citrus fruits like lemons, oranges, and grapefruit can cause irritation in their respiratory tract. So it’s best to avoid these scents in your home for your dog’s safety.
Dogs turn up their nose at anything to do with vinegar. The strong, acidic smell of vinegar is too strong for a dog’s sensitive nose.
Dogs hate the smell of fragrant spices like garlic, ground mustard, and paprika. These are good repellents to use in the garden because your canine will avoid them and therefore won’t damage any flowers or plants.
Dogs hate the smell of mustard oil, so it’s also a good repellent to use. The strong scent is so powerful to dogs that they won’t come near it.
Mothballs have a very distinct smell and it’s one of the smells dogs don’t like. Once again, it’s the chemical in moth repellents that keeps dogs away.