It is apparently mating season in my area so my guineas paired up and went their separate ways (I own 4). One of the boys got hit by a raptor and had his neck broken bringing me to 3 (poor girl kept calling for her mate). I got these birds to help with alerting my chickens to dangers in the area (they have done well so far). My concern is that there are not enough eyes watching the skies now. So how big do I need to build up my flock for guard duty?