My wife and I are planning a camping and climbing trip and we would likely need to rappel with our medium-sized (45lbs/20kg) dog. Holding the dog is obviously unacceptable, and using the dog's backpack is also unacceptable due to the flimsiness of the straps and buckles.
Simply from a technical perspective, and assuming the dog is capable and isn't traumatically afraid of heights (she's basically a mountain goat in a dog disguise), what equipment would I use to rappel with a dog? Would it be similar to rappelling with a child (except with a dog-specific harness, of course)?