Still having a problem finding really little bird poop in my feeders every day, smaller than a grain of rice. The run is chain link, but covered in 1" chicken wire and the top is covered by 3/4" aviary netting, but still find poop every day. they seem to raid in the super early mornings. Problem is my flock gets repeated infections of cocci, really bad as I have lost way more birds in a year more than I keep, so it causes quite a turnover in the flock. Are there birds that can get thru?