Thanks for the heads up, I did not know that.

Could you link the study if you can find it? I could not find it after a quick search.

I would really like to know how different factors affect this. I think, without knowing, we kinda did some things that might mitigate this to a degree: We normally have very little food in the feeder. It typically is empty after a day or two. Once the feeder is nearly empty we clear the remaining kernels, stuff they don’t like as much (and I guess, the poop with it). Would love to know if this actually helps and if they discussed other factors in the paper.

Edit: Just seen the link posted (how did I miss that) and it does answer why my points don’t matter. Don’t use flat feeders ever.