Board Thread:Naruto Discussions/@comment-32117903-20170914232807/@comment-1512913-20180113105013

Namikazenaruto9 wrote: So the frogs don't have chakra? They do, all living creatures on Narutoverse's Earth do, I believe this was mentioned in canonical source somewhere. But they got it from Hagoromo. Hagoromo (possibly with Hamura too and/or followers) spread chakra to humans and animals and descendants of those then were naturally born with chakra.

For the question if it's possible to use techniques with natural energy alone, in all actuality, yes, I believe there has been a technique that according to databook uses nothing but pure natural energy, although not sure which one it was.