It's common for such a factor to be noted in studies of this type, whether the subject of the study is DE, peas, beet pulp, digestive enzymes, beet pulp, etc.
So there's still no proof the DE alone is what caused the difference, since the hens were "free ranging", meaning they can't be sure what else the birds actually ate.
So there's still no proof the DE alone is what caused the difference, since the hens were "free ranging", meaning they can't be sure what else the birds actually ate.
The results of this study suggest that there is no evidence that DE is an effective treatment
to control gastrointestinal parasitic infections of free-range laying hens.
However, DE as a feed ingredient may maintain body mass, increase
egg production and improve egg quality in free range laying hens fed
an organic diet."
to control gastrointestinal parasitic infections of free-range laying hens.
However, DE as a feed ingredient may maintain body mass, increase
egg production and improve egg quality in free range laying hens fed
an organic diet."

