My wife has a home based hair salon and we’ve have 9 layer chickens. One of her customers was waiting and went behind our house and fed them grapes in the coop, couple days ago I noticed one of my hens was acting weird and noticed her crop was huge like a softball and told my wife we need to find out what’s going on (thursday)and as soon she picked her up she starting spewing liquid out of her mouth. Long story but this morning (Sunday)we massaged her crop and and she started doing it again and A big piece of grape came out, her client was waiting and fed our girls grapes. She died this morning out of the blue sitting on a chair on the deck and turned her head and starting convulsing and was gone within in a minute. 2.5 years raising 9 chicks from day old and never had a problem until today and from some brain dead $uck thought it was ok to feed my girls whole grapes.