Garlic is on the Unsafe list for rabbits. It destroys red blood cells.
Pumpkin seeds are supposed to be an effective wormer. I have only fed them shelled raw, but GlitterMomma posted a recipe that extracts the active property, cucurbitacin here:
I'm curious, MSD, where did you read that? I watch the local wild bunnies eat wild garlic around here like candy...is there something in the garlic humans use that is different? I would have no idea about it's deworming capabilities in any case, just interested in learning