Full Moon Fever / War of the CatDog

S1 E3: It is the night of the full moon and Dog's canine instincts are in full bloom.  At first Dog resists his temptation to run with the wild pack, but soon he is overcome and he seeks to join the Greaser Dog's brotherhood.  While Dog goes through his initiation, Cat takes a major beating.  Once accepted among the Greaser Dogs, Dog is very proud, but when he realizes the toll it's taken on Cat, he realizes who his real brother is.Cat begins to label all of his belongings in order to prevent Dog from wrecking them.  In retaliation, Dog buries some of the choice items, including a tug of war trophy won by the both of them.  Cat believes the trophy to be his and a full scale war erupts, with Cat and Dog painting lines down the middle of the floor.  Finally, everything inside the house -- indeed, the house itself -- is sawed in half.  With all their possessions ruined, CatDog learns the most valuable asset each has is his other half.