Do dogs or cats detect smells better?

Answer 1

Dogs have a better sense of smell. Smell is a dog's most highly developed sense. Their wet noses dissolve the scent molecules and help them detect smells that mere humans cannot perceive. Many dog experts believe that the canine sense of smell helps dogs 'talk' to each other and help define their relationship. Dogs use their olfactory senses to interpret other dog's pheromones (external chemical messengers) and learn important information regarding gender and receptivity to mating.