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The rottweiler is featured on "The Spaghetti Catalyst" in which Sheldon tries to remain friends with Penny and Leonard secretly after they broke up. Sheldon sneaks out of his apartment to get some hot dogs for Penny to put in the spaghetti she was making, like how his mother used to make it. He bought some and hid the packet of hot dogs down his trousers so that Leonard wouldn't see, but an angry dog that looks like a rottweiler follows him and barks at him. Sheldon is afraid of dogs and the dog senses he has food so Sheldon gets chased by the dog and appears at Penny's doorstep with only one hotdog left.