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I think I remember that discussion kyrill as I found a few articles regarding the raw lentils that were added to the hamster mixes and what the articles said was that raw lentils contain a substance that can actually prevent the body from absorbing other nutrients from other foods, causing weight loss. I wasn`t too popular for bringing those facts up. I can`t remember all that was written as it was quite some time ago, but like you, I found them rather wanting in terms of professional analysis. Many commercial brands vary too in content, but these possibly have to go through more rigorous testing and certification before being allowed in the market place.
The JR Farm mixes are good Nicky. I bought four bags of the dwarf version for my Russian dwarf even though I feed Burgess Supahamster too (one you may want to consider for a Syrian) as it has good variety like whole peanuts, pumpkin seeds, poultry meal biscuits and the usual mix of flaked grains, sunflower seeds etc....x
It can be frustrating when you know something to be fact and highlight your concerns and then get nothing but negativity while others will listen. Producing a hamster, mouse, rat food from scratch I imagine takes a lot of homework and calculations. Something I could never do! I often wonder where companies who make these foods get their analytical information from. I suppose it`s from animal scientific studies regarding their nutritional needs? When we call a hamster mix "complete" I don`t suppose a human diet could be called the same since we eat what we want, when we want and our diets seem to keep us going regardless, although comparing the two is probably silly anyway, but you know what I mean! x