Don’t let perfection be the enemy of good. If everyone stopped eating animals, there’d be no surplus of blood and bone for fertilisers, and other plant based by-products would fill the space.
As for the rabbits, I actually have a small Australian shepherd that runs through my lawn chasing the wallabies that meander by, I’ve been meaning to trap it and humanely slaughter it, the blue coat would make a great gift! And if the owner comes by looking for Bella, I could trap him and humanely slaughter him too. He looks a bit simple, so it seems ethical to me? He’d make good compost, that’s for true.