Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "If a cat puts its mouth into a vessel, it should be washed in the same way as it is washed when a dog puts its mouth into it." The Shaykh (Imam al-Daraqutni) says: This narration is not authentic as a "marfu‘" (attributed to the Prophet) and is more authentic as a statement of Sayyiduna Abu Hurairah (may Allah be pleased with him), and there is also disagreement regarding this matter.
Hadith Referenceسنن الدارقطني / كتاب الطهارة / 208