Does a chihuahua have a better sense of smell than a pitbull?

Chihuahuas and pit bulls both possess a keen sense of smell, typical of dogs, but there is no definitive evidence that one breed has a significantly better sense of smell than the other. Generally, scent detection ability varies more with individual dogs than with breed. Larger breeds like pit bulls may have a more powerful overall olfactory system, but chihuahuas can still be quite adept at using their sense of smell. Ultimately, the effectiveness of a dog's sense of smell depends on factors like training and environmental exposure.