My guineas lasted 3 years before the predators took the last one. The last couple roosted on lattice over the porch (not good), and the coyotes would occasionally come right up on the porch and try to get them. The remaining birds then started roosting in a tree in the dog pen. The females would get taken out when they nested, and the last male got it from a hawk. Mink are pretty lethal too. My wife want to try more fowl in a pen surrounded by a dog run. We will see how that works out. I was thinking about the duck breed that lays lots of eggs, but folks here are pretty negative about domestic ducks in ponds, so maybe that is a bad idea.