Hazrat Abu Qatadah (may Allah be pleased with him) used to tilt the vessel for the cat and used to say that the Noble Prophet (peace and blessings be upon him) has told us: "It is not impure because it is an animal that frequently comes to your homes."
Hadith Referenceمسند احمد / مسند الأنصار رضي الله عنهم / 22528
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد اختلف فيه على إسحاق بن عبدالله بن أبى طلحة