due to this being pre drum island arc chopper, he doesn't know who Luffy and his crew is, Chopper has a blue nose, Chopper can turn into a human-deer hybrid or a musculine human but keeps the blue nose, his "hands" are deer hooves, but he can use them just fine, he was born with a blue nose naturally, which made his herd leave him behind often, he was also neglected by them.