There is no clear answer to this question as both rabbits and dogs have highly developed senses of smell. However, rabbits may have a slight edge over dogs due to their larger nasal passages. This extra space allows for more airflow and therefore, more scent molecules to be detected.
So, while it is difficult to say definitively which animal has a better sense of smell, both rabbits and dogs are certainly impressive in this area

FAQS
Q: Do rabbits have a better sense of smell than cats?
A: No, rabbits and cats have about the same level of smell sensitivity. However, cats are better at detecting moving objects, whereas rabbits are better at detecting smells.
Q: Can dogs detect cancer?
A: Yes, dogs can be trained to detect certain cancers by smelling molecules that are released by the tumors. This is an incredibly valuable tool for early detection and can often lead to earlier treatment and a higher chance of survival. Dogs are also being used to detect other diseases, such as diabetes and seizures.