Well, this is the thing I find so amazing - and actually why I've been so insistent about knowing whether or not the dips really were mitaban. Ivermectin is a popular (and, unless the dog is a herding breed, much less damaging) form of treatment for mange. But I don't think I've ever heard of anyone using it in
conjunction with mitaban. She may have a severe case of mange, but that seems like overkill (and with risks).
What is hard to know, in your puppy's case, is which treatment is it that is helping? The mitaban or the ivermectin? Considering the risks of mitaban, if I were in your position and going to drop one of them, I'd choose to dump the mitaban and keep going with all 10 shots of ivermectin
I'm not sure that that is necessarily true... BUT it is worth bearing in mind that the reason that good diet (and low carbs) is so important is because dogs aren't evolved to consume a diet that includes carbs. Most dogs can tolerate carbohydrate-based diets, but "tolerate" is a heck of a long way from "thrive"

What you've got to figure about carbs in dog food is that (a) they're in there because they're CHEAP compared to meat and (b) it is impossible to make those convenient dried up little pellets that are kibble without large doses of carbs. Carbs in commercial dog foods have nothing, ZERO, to do with what is a species-appropriate diet for the dog, nor what he has evolved to consume. Sometimes that isn't an obvious problem, sometimes it is.
Nutrition for dogs, as much as for humans, is the underpinner of good health and healthy immune system. So whilst it is quite possible that, once your dog is fully recovered and thriving, you might be able to just feed a kibble diet - you will be feeding an inferior diet. And you can probably expect that to have some sort of impact upon long term health, even if its not an obvious and immediate impact. Thus, for the long term,
even if you find your dog appears to tolerate just kibble quite well, you would probably be doing her - and your wallet, considring long term health costs - a favour by continuing to provide superior nutrition through the adding of real meat to her diet.