Apparently the reason he was cut from the villains wiki is because he’s seemingly just a dog with killer instincts. However, when interacting with Sid, he acts fairly normal when Sid tells him sit which cements that he understands words. If anything he’s more of a villain than Sid since he found out the toys were alive before Sid found out, and unlike Sid who stopped harming toys after being aware of their sentience, Scud attempted to maul Woody and Buzz to death when they left Sid’s house.