I eventually would love to get a few guineas. I don't know if I could let them run loose on only 4 acres though. They would probably be in the nieghbors' yards lol. Either that or there are a lot of woods behind our house, they would most likely go in there and never wanna come out unless I kept them in a pen.
Mine eat the seed under the feeder but then they get distracted by the guinea in the sliding glass door and have to walk over and yell at it. I learned not to let them near the feeders when DH is sleeping. That door leads to our bedroom! lol
As long as it wasn't moldy or mice had got into it, should be fine. I buy wild bird seed by the 100 pound bag and my girls love it, it's their special "daily treat." When I shake the can with that in it, they come running and will do my bidding (well, sort of)...