After trying to work with many different pieces of firey doggy pictures, I settled on this one because it looks very classic and many of the battlemech regiments have classic design elements built into them. The colors for the stripes are inspired by the old Imperial flags of Germany (WW I and unification era under the Kaisers).
While I prefer the white above, at least you can see the doggies claws on this one. Teuf tried to outline them in black for me, but it didn't work out. However, I would consider using this one over the pure white one above if I can't find a way to outline the claws in black. As of now, this is the official logo of the Devil Dogs. I'm hoping Teuf will make it into a TNG or whatever those files are called for our battlemechs. We currently have the above white background one available for our MW4 mechs.