Question
Can you provide a picture of a Dunn's Salamander with Dropsy?

Answer
I'm afraid not.  I don't have any salamanders myself.  I'm not familiar with the Dunn's salamander let alone one with dropsy.  I've not heard of salamanders with dropsy either.  I could imagine they could become bloated.  Here's a photo of a Dunn's salamander I found on the internet (no dropsy).
http://www.californiaherps.com/salamanders/images/pdunniidn306.jpg

Good luck in your search!