Dan - sorry to hear you are having such a lousy start this season!
I put down some blood meal yesterday and have my fingers crossed. It sounds like your rabbits are doing as much or more damage than mine. My veggies are all in high raised beds, and the rabbits don't get up there, so at least something is safe. But like you - I am a bit nervous to put out more dahlias right now, especially since they are the smallest (and most delicious) ones.