Combine chicken mince, rice, onion, salt, pepper and garlic in a large bowl.
Take 1 tablespoon of taco seasoning mix from one of the packets and add this to the meatball mix.
With clean hands, combine mix well and form into small, approximately golf ball sized balls.
Roll each completed ball lightly in plain flour to coat and place aside for now on a plate
Combine crushed tomatoes, soups, and the remaining 1 and part packets of taco seasoning and mix well.
Pour this sauce mix into the slow cooker.
Gently drop meatballs one at a time into the sauce in a single layer.
Cover and cook on low for 5hrs
Resist stirring at all until at least half way through cooking to be sure they are firm so they don't break apart. In reality though you only need to gently move them around in the sauce perhaps two times in total during cooking if at all.