Does the vest and belt-harness come with the dog or would that be something the handler needs to purchase?

Everything is included.

Also, if the handler happen to have a crate, bed, dishes, bones, toys, and such, we'll send those, too. We'll even give the handler a big bag of the same grain-free dog food of the same brand the dog has been eating. If the handler ever wants to switch food brands, use a different bed, etc., they always can, but it's nice to make the transition of the the dog’s beginning their life with them as smooth and easy as possible.