Shakespeare Play Disney Ripped Off: Romeo and Juliet
Reasoning: Two dog-houses, both alike in dignity... but not really. But it is enough for me to look at two dogs who are clearly never supposed to be with each other because of societal pressures but who end up TOGETHER!
I saw a production of Romeo and Juliet once where they were eating spaghetti and kissed and then romeo gave Juliet a meatball with his nose. Coincidence? I think not.
Also, in the directors cut of Lady and the Tramp he poisons himself and she grabs a knife with her teeth and through a miracle of animation stabs herself in the chest with it.