Wow -- I'm at work, and this is going to take a while, so I'll give you just a couple of thots now, but we probably should talk.
labrickner
Nevertheless, he shows signs of Cushing's Syndrome that I hope will abate soon (pot belly, thin skin, hair loss). Plus I think he has demodex -- which is how I found this forum in the first place. Fortunately, I don't think the skin issues are bothering him; no itching, just some patches of hair loss and some dark spots above one eye, and some more spots at various patches of hair loss.
He's been on pred now HOW long?? Cushing's would certainly be possible.
I'll be honest -- as immune-suppressed as this dog is because of all of the steroids, I wouldn't dare do a raw diet. I'm not anti-raw, not at all, but not with an immune-compromised dog. You may be lucky that your meat source is a good one, but it's a bit like Russian roulette simply because this isn't like allergies or something where you are trying to get the immune system TO respond and 'be all it can be' with the raw diet. In this case, quite honestly, you want the immune system to just chill out and relax right now. You truly don't WANT to boost it, nor do you want it responding to various things willy nilly (which is what a raw diet is supposed to do -- it's supposed to MAKE the immune system work, and in this case you want it *not* to work.)
If you'll email me I'll send you my demodex article - you can do a whole lot topically with bathing, etc. to help keep the mites under control.
Milk thistle at the very least -- and honestly I would be telling you to do a blood panel every couple of months just to check the liver/kidneys (because all of this can SO easily morph into diabetes, etc -- particularly where there has been such huge steroid use for a long time).
Honestly, the skin thing sounds chonically auto-immune to me as well
"(pot belly, thin skin, hair loss). " -- yes, those can be signs of Cushings. They can ALSO just plain be side effects of prednisone. They will get a pot belly from the months of pred use, and steroids generally CAUSE thin skin (even topicals do that). Hair loss -- generally all these drugs are heck on the skin (the body actually tries to expell some of it) but they are ALSO extremely hard on the thyroid.
Here's where I'm going to tell you something different. The only reason Billy is in "one piece" literally and figuratively is because I used alternative medicine on him -- he was treated with TCVM (traditional Chinese veterinary medicine) with acupuncture and Chinese herbals all the while he was in IMHA treatment and still is. Once I got him off all the steroids he was, flatly, STILL a mess -- his skin was a mess, he went from one chronic inflammation to another boom booom boooooooooooom!! At one time he had both pancreatitis and hepatitis at the *same* time.
So from there I *also* have used homopathy extensively on him. We go to Dr. Joe Demers who does the "autosanguis" treatments on him (it's sort of a cutting-edge homeopathic treatment where they make a serum from his blood added to homeopathic remedies so that the genetic mapping in the blood literally becomes a 'remedy' to tell his body exactly what needs to be done.
The results have been unbelievably good. He is HEALTHY. Frankly, healthier than he ever was **before** IMHA. Homeopathy can really work incredibly well with auto-immune stuff because it is, at it's roots, a body balance problem.
The other reason for a broad spectrum blood panel is to see what the liver is doing -- if the liver is "not happy" then frankly the skin isn't going to be good. You can do all the "right" things and fail because the liver is so completely intertwined iwth the skin
Also some good thyroid testing -- and for that I'd go to Dr. Jean Dodds (http://www.hemopet.com) -- not just the traditional veterinary approach -- her approach screens not only in a breed-specific manner, but she's also developed new auto-immune checks (there's a lot about auto-immune stuff and hemolytic anemia generally on her website).
Sorry, that's all I can do for now. I'm available by email to help you more.