Dash, thanks for the update. I hope Sugar is soon doing better. That heartworm treatment is a b**ch for any dog. I hope your continued updates convince people that the the annual blood work and preventative are well worth their time and money, because as you well know, the alternative is quite a bit more costly and painful for the dog (and family) in the long run.
Again, thank you and my prayers to you for a better month for you and Sugar.