A rolling cart/carrier that self-rights a pet contained in the rolling cart/carrier regardless of what terrain is traversed, and is height-adjustable so as to allow comfortable rolling of the rolling cart/carrier by a user. The rolling cart/carrier includes a cart and a carrier. The cart is height-adjustable so as to allow comfortable rolling of the rolling cart/carrier by the user. The carrier is replaceably attached to the cart, and self-rights the pet contained in the carrier regardless of what terrain is traversed by the cart.
