I just picked up some blood meal and will spread that around , especially the smaller plants.
I am not big on shooting the bunnies (I don't own a gun)- When I have trapped them in the past they get a trip to the park on the other side of the highway. However, when they have been destroying my garden, and my neighbor takes them down - I admit to not shedding a tear.
The product you pointed out looks good - thanks for that. If the blood meal doesn't make the difference, I'll try it. This time of year a bit of extra nitrogen for the growing dahlias is needed anyway, so blood meal seems like the best choice.