i have about 60 guineas and they do alert to almost everything. i wouldnt expect them to be at "home" if there was a larger flock around. they eat anyting that doesnt eat them first. they do leave the garden alone after it is growing good however they can remove seed faster than we can plant..my first guinea was a guinea that wasnt mine but after planting and watching it remove seed four days in a row i set about catching it and putting it in guinea jail ( a a frame house/cage/run, latter let it go and it went to roost with my chickens and has live here after, my goal wasnt to keep someones guinea, but to let my seed sprout and then let it go wherever its home was). gunieas are great as long as you go into the hobby as a long term time consumeing hobby knowing that a guinea isnt owned by anyone, you may buy it and you may invest in it in a coop, feed, time, etc, but a guinea is not realy owned by anyone..they do as they please when they please, you may catch and teach but when they decide they are going to do something then they are going to do what they decide. i would expect if you got a few they would go to the larger flock as soon as they could, i also would expect if you can hear the neighboors birds then the neighboors birds if free ranged will patrol your yard, here they wonder in a wide area.
