Hi Vanessa! Yes, it can be discouraging when the wildlife eats your favourite plant, and alarming when they eat something poisonous. One year, the deer munched my Colchicums - but they only did it once. There's probably a very nauseated rabbit out there somewhere thinking, "I won't eat foxglove and aconitum again". Can you surround your clematis with wire netting up to the height that a rabbit can reach?
I'd love to see a pic of the kangaroos grazing on your lawn!