How is the ruling on a vessel, after a dog has licked it, measured against other ritually pure things?

Previous scholarly discourse has thoroughly addressed the impurity of dogs. There is no distinction between the licking of a dog (wulūgh) and other forms of contact if the reason for washing seven times is impurity itself. The Shāfi‘ī and Ḥanbalī schools of thought hold that it is obligatory to wash seven times any place touched by a dog's impurity, whether from its saliva or anything else, regardless of whether it is clothing, the body, or other items. In this regard, the ruling is the same as that for a dog licking from a vessel. Conversely, the Mālikī school believes that the ruling is restricted to the vessel from which a dog has licked, and they consider a dog's saliva not impure, viewing the ruling as an act of worship (ta‘abbudī) without a discernible rational cause.