<Li> Henry Mitchell--Age 32, Dennis' father is a workaday aerospace engineer . Henry seems to understand Dennis more than his wife does, especially in affairs of the heart . One example was when a furious Dennis stormed in, saying, "Wimmin can say some of the stupidest things!"; Henry knowingly said to Alice, "Margaret ." Another time, while Dennis was watching Gina, he confided to his dad, "There's somethin' about Gina that I can't figger out ." Henry wisely advised his son, "Wait ." Again, Henry and Alice overhear Dennis tell Gina that she "smelled better than a plateful of peanut butter samwiches". Henry remarks, "The ultimate compliment ." Like his creator Hank Ketcham, Henry served in the US Navy; his position was as a quartermaster (Helmsman) 2nd class on a battleship . Sometimes, he and Alice will get into arguments (which even show his chauvinistic side at times); however, they remain devoted to each other . Among his hobbies are golf, taking naps, fishing, and playing the ukulele and singing old songs with George Wilson . A running gag is that Henry often plays the straight man dupe--either resulting from Dennis's pranks, or because of his own foolishness; once he tried to save money on a Christmas tree by cutting one down in the country--and ended up paying $20.00 ($10.00 for a fine and $10.00 for the owner charging him for the tree). </Li> <Li> Alice Mitchell, née Johnson--Dennis' stay - at - home mother Alice is usually the reassuring figure Dennis can run to when things get too overwhelming, ready to greet him with a warm hug . Although she grew up among animals on a chicken ranch, a running gag is that Alice Mitchell has a phobia of snakes . Another running gag involves Dennis's ever - changing parade of new babysitters: no one will take the job twice . Alice is also known for punishing Dennis's misbehavior by having him sit in the corner in a rocking chair for timeout, although a couple of times she has instituted tougher disciplinary measures such as spanking, where afterward Dennis is shown crying or grumbling about the adversity . </Li> <Li> Ruff Mitchell--Dennis's big, lovable, faithful dog (an Airedale mix) and best pal . Ruff is always eagerly following him around, accompanying him while Dennis is running, or riding his bike or skateboard . </Li> <Li> Hot Dog--Dennis's rarely seen cat, who usually commiserates with him while he sits in the corner and reflects on his wrongdoings . Dennis gave the kitty this name after the cat ate a package of hot dogs . </Li>

What was the name of the dog of dennis the menace