I recently noticed my 8 month old roo have saliva whenever he eats. This only occurs when he eat so there is excess saliva and he can’t eat the food. I don’t think it’s a crop issue, because the previous day he did eat some and when I felt his crop on the morning it was empty. In his mouth I did see sort of a white patch on the side of his mouth not sure what that is. He also isn’t wheezing of anything and acts normal. Please someone help, the vets around me don’t see any chickens so that isn’t an option.