ranma is best,because if a guy chase him,he can turn to her which is 100% differnt,but for the dad,if he turn into a panda,they will say"OOH rare panda meat,Roar!!!!"
Hate to say it, but its definately Ranma. Duck? Small Pig? Even a cat just isn't that great. And where can you go as a Panda? Being able to DO something while transformed has got to be worth something.