Unfortunately, there are no specific guidelines for the amounts of nutrients like protein, sugar, fat, fiber, calcium, phosphorus or iron for us to go by.
I evaluated all of the then popular glider staple recipes when I first got my gliders and found that Original HPW has more sugar than any other staple but the lowest amounts of protein, calcium, phosphorus, iron, fat and fiber. BML on the other hand was highest in every thing else except sugar - especially protein and iron.
I felt the amount of honey in Original HPW was too high and believed that the recipe did not contain adequate calcium for my gliders. My gliders did not eat BML - and seemed to dislike anything with the gritty Rep-Cal Calcium added. I also fed other diets used at that time but did not feel they were well balanced either.
I wrote my own staple recipes (GliderKids Staples 1 through 4) so that the values of the nutrients in each glider portion was mid-range between the the BML and HPW Values. I included the GliderKids Leadbeaters for owners that were happy with the BML staple but did not want the restrictions on the fruits and vegetables they could feed with it. My GliderKids Wombaroo staple is intended for folks that have gliders that like the Original HPW but want their gliders to have a bit more protein and enough calcium so the ratios of the fruits and vegetables chosen are not a concern.
Baby cereal is be largest contributor of iron in the BML recipe. I removed it from my GliderKids Staple recipes (other than the GK Leadbeaters) several years ago because of the community's concern over the iron content in glider's diets.