[Cold Heat]

Well, without having a hands on look, I am assuming that the mange is responsible for what looks like deformation of the creatures hide, especially around the face and gum line. Also the area around the ears, because the lice like to nest in those area where the larvae can access a lot of fluids and easy places to drill into.

I base this on my own personal experience with mange in canines. I have to use a lot of hydrocortizone and vitamins to get the animals skin back into decent condition.

As to the haunches....lol...not much of a skeletal expert. raccoons sit up a lot on their haunches. They sit like a baby in a way....this one seemed to do that in the vid I saw. He also knew to grab the cage wires...and the growl was unmistakable..

[Salamander]

If the mange is not contagious, it’s demodectic.

If it’s demodectic and your dog is having sporadic outbreaks, it’s most likely auto-immune and any type of cortisone suppresses immune function.