I've heard that if you gently rub the frog/toads sides during the honey soak, it can help. Just a thought.
Otherwise, I'm not sure. You may want to see if you can find any other remedy for impaction online. Hopefully, someone with more experience than me will comment on this thread soon. I'd suggest contacting Heather, Gail (kueluck), or someone with expertise with toads. They should be able to help.