yeah my dads got some at his place. He is still planting his vineyard so im not sure what they are like once vines are grown. From what i have noticed they dont ever jump or fly at all, they just run so i dont think they would jump to grapes. They remind me of quail. They do tear through insects though. they eat anything like chickens. He bought two different types of gunies though. the first type seemed to be super dumb and died easier. I think he bought some kind of french one later.
you wanna see something gross and cool at the same time. Break open something that is full of roaches with some chickens on standby. Whew some live action there!