Does Catnip Affect Dogs?

The simple answer is yes.

Catnip contains chemicals that can act on the brains of members of the cat family, leading them to become excited and playful. Dogs, on the other hand, do not have the same receptor cells in their brains that are influenced by these chemicals, so they do not experience the same effects as cats. However, some dogs may still react to catnip by exhibiting behaviors such as rolling around in it or licking it, but this is usually due to the novelty of the smell rather than any psychoactive effects.