Originally posted by: Necromas
Wouldn't it have been more effective if Kakashi had done Kage Bunshin + Henge to make better fakes then usng Kawarimi + Henge?

It's pretty plausible that a shinobi as skilled as Kakashi could use the transformation jutsu to make an animal that already resembles a human look like him.
yes, but it didnt happen, so there is no use racking your mind over it. A kawarimi also takes less chakra.