DISCLAIMER: If you are not into diet or nutrition, this may not be for you. This is on point with the topic of this post but it in no way should be perceived as bashing. What follows are simple facts.
The HPW diete is an example of a "popular" diet in which the maker of it made a decision *not* to do a nutritional analysis and also not to publish a nutritional analysis. That puts you as the glider family in a "trust me" proposition.
In our observations in formerly using HPW with many rescues - it is OK but it does in fact fail to yield an optimal Ca:P ratio. This fact is known by its maker. We recommend bumping the calcium in it for optimal results.
BACKGROUND: We've done a lot of research on the HPW diet and other "popular" diets. The research on HPW started with correspondence with the Passwell company that makes the High Protein Womberoo Powder. Here is the data sheet they sent us that we used to crank into the formula for the diet:
Here are the calculations for the diet that we did at LGRS because no one had bothered to do it:
As you can see, the HPW Diet is 1.29:1 which is not 2:1 or very close.
This analysis is what brought to light the fact that you need to bump the calcium if you use this diet.
This in itself is not "bad" - but it is not an optimal basis for moving forward with a balanced diet because most fruits and veggies that you would feed on the side are upside-down to begin with.
So for people new to gliders or people who do not understand nutrition, they may *THINK* HPW is correct ratio-wise and then add stuff on the side that is also not correct and end up with a problem.
So if you use the HPW diet and then constantly feed corn, peas and carrots, you run the risk of HLP -because corn, peas and carrots are upside-down Ca:P wise.
We have even seen internet pages promoting HPW with relishes for side dishes that are upside-down so it is frustrating to see this.
A "quick fix" to this is to add calcium to HPW by either putting in some powdered calcium into the batch - maybe half a teaspoon - or by using calcium-fortified orange juice instead of water.
Here at LGRS, we began to use this diet for a while until I did the nutritional analysis. We got pretty good results with it, but we wanted to work on a cheaper, more balanced diet. That was the basis for the LGRS suggie soup diet. First, you should know that it is not necessary to buy expensive, imported HPW powder. You can use Trader Darwins Vanilla Flavored Soy, or you can use Arnold's choice possum milk replacer. You can also use fewer eggs and add dehydrated fly pupae to cut down on the cholesterol and fat. You can also cut down on some of the honey if your gliders are getting too fat.
There is an article on the LGRS suggie soup here in the gliderpedia and the nutritional analysis is also in the nutrition section:
http://www.sugarglider.com/gliderpedia/index.asp?LGRSSuggieSoup
We recommend taking the nutritional analysis of diets to your vet and let your vet give you guidance on diet. but we recommend you start with diets that actually have a nutritional analysis. If you decide to use other ingredients besides what's in the diets - do your own analysis first. Here on GG under Resources/Nutrition you will find a recipe calculator that lets you do your own figuring.
'Hope this helps