Here's a breakdown:
* Cleanest in terms of hygiene: The most hygienic part of a dog is likely their nose. It's constantly moist, self-cleaning, and helps them detect scents and analyze the world around them.
* Cleanest in terms of grooming: A well-groomed dog can have a clean coat, especially after a bath and brush. However, even the cleanest coat can get dirty quickly.
* Cleanest in terms of least contact with the environment: The paws and tail are often dirtier than other parts of a dog's body due to contact with the ground, mud, and other substances.
Ultimately, the "cleanest" part of a dog is subjective. A well-maintained dog will generally be cleaner than a dog that is not well-maintained.
Important Note: It's crucial to maintain good hygiene with all parts of your dog's body. This includes regular bathing, brushing, and cleaning the ears and teeth to ensure their health and well-being.