The diet plans are made available. Many of these diet plans have been used for YEARS and for generation after generation. If a diet is bad, then it will get many many bad reviews. Diets that have "proven" good (and I do use the term proven very loosely here as I don't believe ANY diet is truly proven) will have many people saying "this is what I have used for this long and with these results".
From there, I think it is up to the individual, if they are so inclined, to take the components of that diet plan and research it for themselves.
The diet plans I see, the ingredients are not secret. The ingredients are there for further research IF the person is so inclined.
There are so many variables involved even with a natural Aussie wild diet. The manna will vary from one location to another. To simply say, feed manna could be very misleading as well. To simply say, feed bugs, again, could be misleading. Yes, gliders in the wild eat insects but what types and in what quantities. Should we all be importing our bugs from Aussie? Ok, what kind of bugs and how many? Fly larve? Ok, from what type of flies?
I encourage people to do their own research. I also strongly encourage them to use one of the "proven" diets such as BML, PML, SunCoast's, etc that has been used successfully for years and years and generation after generation WHILE they are doing their own research.
The information provided with different diets, is intended to help out those not able/willing to research. They (and I mean the "proven" diets) have been formulated and tested for years so that there are choices available for those that want the easy fix.
If you aren't satisfied with the easy fix, RESEARCH on your own.
Take the ingredients of your diet and break it down. Find out what vitamins react to or enhance others. The basics are provided for you.
I do not feed one of the "proven" diets. I have done my research to learn and have decided on a diet plan for MY gliders. I'm having great results so far but it has only been about a year. I will say that any resues that come in to me get fed the Back to Basics BML plan. I do this because MY diet is still "experimental" and I trust the PROVEN track record I've experienced with the BML. I do not feed the BML to my gliders for several reasons, one simply has to do with cost. I have currently 55 gliders (19 of them are rescues that came in this past Sunday and they ARE on BML) I'm caring for and I simply can not afford to feed them all the BML. That is reality. I don't like it but that is the way it goes.
Another reason I do not feed BML to MY gliders is MOST of them will not eat any diet with honey in it. I've tried PML as well, and they do not touch it either. Through a process of elimination with the BML mix, I was able to narrow it down to the honey being the reason they won't eat it. And yes, I have tried several different types of honey including honey from Aussie.
When it comes to diets, any of them, regardless how proven the tract record, how well documented all the research, no matter how good the diet is, if your gliders won't eat it, it isn't any good for them.
What needs to be taken seriously is...there are simply foods that are NOT good for gliders. Hot Dogs, ham (usually cured with salt or sugar), high fat items such as nuts, pudding, peanut butter. Things like bird seeds that can get stuck in a gliders very tiny throat and/or cause impaction in their digestive track. Garlic, onions, chocolate, artificial sweeteners... Atleast I hope we can all agree on the things that SHOULD NOT be fed to gliders.