It was just on what bird mutes were, (after that I didn't want to read more), but I suppose if there was a lab analysis of bird mutes compared to human urine, you would get a definitive answer... I'm just not the guy for this lol. Maybe you could conduct an experiment on this yourself...
The whole point of including urine in a captive diet would be to mimic something included normally in a wild diet. I'm sure bird mutes are a more likely source in a wild diet than is Human Urine. Besides the birds eat healthier than most humans anyways.
Edited by Acutus, February 15 2020 - 8:05 PM.