Interesting post. Could you define what you mean by intelligence? I think you mentioned a few indicators but in regard to human evolution/development I take it that the development of the brain (biggere than a chimp brain), speech and a consciousness which is able to question its own existence are pretty strong indicators. We could probably inculcate habits in our domesticated animals which can be passed on from parent to child, for example cats using cat litter or dogs using the neighbour's garden
. However, to affect their evolution, that is a bit heavy to believe.
