Line 11x7 in. pan with foil, extending foil beyond edges of pan; grease foil. Melt chocolate and butter in saucepan over low heat; stir in corn syrup, cream, vanilla and salt. Remove from heat and gradually stir in powdered sugar until smooth. Spread evenly in prepared pan. Refrigerate until firm, 1 to 2 hr. Using foil as handles, remove fudge from pan; peel off foil. Using cat cookie cutters cut out cat shapes in fugde. Place 2 vanilla milk chips on each cat for eyes. Score feet to make claws. Cover; refrigerate until ready to serve.