In a nutshell, guinea pigs shouldn't smell. If they are giving off an unpleasant odour, it's usually a sign that the cage isn't clean, their diet is wrong, they're sick, or they're struggling to groom themselves. Also, boars may smell more than sows because of an oily buildup around the grease gland.

Are guinea pigs naturally smelly?

Guinea Pigs Are Fastidious

This self-grooming is why guinea pigs usually don't need baths. When in a clean and well-kept environment, your guinea pigs shouldn't give off any unpleasant aromas. At most, you may notice a slight earthy smell that is their natural musk. Nothing bad at all though.

Are guinea pigs smelly and messy?

There is so much to love about guinea pigs. However, their cage can become quite stinky very quickly, and the cost of fresh bedding materials can really add up over time. ...