[Harmless Teddy Bear]

There were not that many domesictable animals in the New World. Something wiped most of them out between ten to fifteen thousand years ago. What ever it was also wiped out most of the human population as well.

The wheel was developed but never put to any practical use as there were no beasts of burden to pull carts.

It was sort of in the same category as the Greek steam engine, there but not useful.

[mamelukesabre]

nonsense. All mammals are domesticable if you put in the time and effort with a breeding program. Hand carts are pulled by humans. No animals required.