The tick was a copy and paste job from the net lol!
This thread -
Why Protein 19% Fat 6% Fibre 8%? (Over here Silver!) states the percentages that is recommended by Silver and some of the reasons for recommending them. Silver is unable to share details of her research though (a lot of threads have covered this).
I've never come across any scientific papers that talk about the levels of protein fat and fibre and I'm unsure as to why these figures are seemingly the most important but it does give us something specific to look at when researching different mixes.
Silver, what is the protein, fat and fibre levels for your dwarf mixes? Just so I can add them to the table