Mine are also pretty dumb. I have a chain link pen they love to get into, but the gate is on the opposite side from their home. They walk around the pen to get into it, then can't figure out why they can't walk straight through the chain link to take the shortest route back to the chicken run again. Mine do go out, forage in the tall grass and woods and come back, but I didn't let them out till around six weeks old and then they had chicken peers and an entire chicken flock to follow. I hope yours make it back okay. I've heard letting some out and keeping some back will get the free ones to come back to their flockmates, but I'm pretty new to guineas as well.