Then a blockage ? But both of them having a blockage would not seem possible.
Maybe no gravel to digest food. All in the crop still ?
Water is going through but not food. Two birds having the same malfunction ummm no.
Necrotic enteritis...
Well, could have been rat poison, could have picked up Newcastle as the other place they lived.
But your birds are okay. So they must have gotten it elsewhere. Could be they were not getting enough food at the other place.
Huh? stumped.
POssible tapeworms.