I’m sorry that your birds are gone. If you get more, think about how you can keep them from ever going over your fence in the first place… I think @R2elk has a fence that’s he’s trained the guineas not to cross? Here are the scare eye balls: https://www.amazon.com/Balloon-Bird...&sprefix=scare+eyes+balls+birds,aps,86&sr=8-3Thank you for your suggestions! My wife decided that the best option, given that "winter is coming" and any improvements will be difficult to implement for at least a few months without freezing ourselves, would be to sell our entire flock of guineas, so this as of this morning our 12 guineas are gone. This spring we'll go over our entire fence line to see where they may have been escaping and fix those areas if we find them-- barring that, I will definitely consider putting up some shade cloth before we raise any more.
I'm not sure what you mean by "scare eye balls" though? Regardless, in order to get to our neighbors they have to cross our (unfenced) parking area and cross our shared driveway, so have to cross probably 30-50 feet before they reach our neighbors area. I guess depending on what these eye balls look like, we could put them in our "parking" area.
My wife is sad, and has already commented on how much quieter our yard is already. Not only is the noise from the guineas gone, but apparently our other birds have remained silent as well.
I use these to help keep the guineas away from our above ground pool! I think it works best if they are moving, like floating in water or tied on a line near your fence line. Best of luck with your future guinea endeavors!