Pigeon Poop

[Simonmurray4747]

Hi guys could anyone point me in right direction as to why my gaditanos droppings are like this? It started out with just one of them about 7 months ago with dropping like this now it seems my other hens going the same? There not like this all the time but I'm just not sure what to do about it, it absolutely stinks too...the birds them self seem fine don't seen Ill any advice would be great thanks a lot

[showman]

Think a pic. may help !

[Billyalves]

Ecosystem

Etc what they look like