I've seen about six posts here in the last day asking "what happened? I feel like crap and I don't know what I'm doing wrong!" Then we get a sample menu and the fat is always missing. It's getting so predictable that I'm thinking I might start taking side bets on the response when a sample menu is requested.
People, fat (saturated as well as monounsaturated) is absolutely essential to doing the Primal diet correctly. You must eat fat. You must eat lots of fat. If you're hungry, fat should be your first and best go-to food. When I get the shakes, if I'm in a restaurant and there's nothing handy while I wait for my food, I will request butter and eat it by itself to up my fats.
EAT THE FAT.