Just saw and read this thread from start to finish.
I'm sorry Red has had such a rough time of it. You care so much about her and I'm sure she knows it.
I'm not sure what's got her to the point of not moving - very serious of course. Hoping it's just general weakness from parasites and that she will rally.
Can you advise what her regular diet is? Is she eating any nutritionally complete foods for chickens? (not sure what's in the 'mash' that you mention)
I would suggest bolstering her nutritionally as much as possible. You can order Avia Charge 2000 on line and mix a bit with her water every day (to light iced tea color). It has a wide range of nutrients; my birds have been on it for years and years and I have a roo that is still thriving at what must be going on 10 years one of these days soon. One jar of Avia Charge will last a really long time kept in a cool dry place. Some people use a product called Rooster Booster - that may be good too, also may have to be ordered on line. I haven't used that one. If you order either, while waiting for product to arrive you can see if she'll take baby parrot feeding formula, also highly concentrated nutrition - this is available at well stocked pet supply stores. Also in a pinch, and while waiting for Avia, can give 3 drops Polyvisol liquid children's vitamins daily, applied via dropper gently along her beak line so she swallows on her own and doesn't choke. The stuff tastes like crud so I would follow with some tasty treat that she likes, e.g. a couple of cut up blueberries.
Nothing wrong with zucchini - just not that valuable nutritionally.
I would be careful about dosing her with too much in the way of chemicals because she is so comprised. Treat the lice certainly. And the basics needed to worm her and no more (lost track of what you already gave her). I like Bagbalm better than Vaseline for the legs - it's incredibly healing but what you're doing should also work.
Not sure if I read whether or not there were surface wounds (or just bruising kind of look) and whether you're using neosporin on them but that is an option.
Needless to say, and I'm sure you're already doing this, she needs to be in a comfy (not too hot, not too cold) quiet room with her creature comforts close at hand...
A vet could help pin this down if an option. If you need/would like an alternate option, there is a person who is a wealth of info and he can consult by phone. Name is Peter Brown at First State Vet Suply (
http://www.firststatevetsupply.com/). Should you end up ordering recommended meds or other from First State, the consult fee of $25 can be waived.
I hope very much she'll recover. Sending many many good wishes for both of you
JJ