Another possible missing cat

Well our male cat, Whiskers, seems to be missing in action also. Both cats are very friendly and are usually on the porch or at least meet us at the food bowl. We haven't seen Waffles in about a week and now it has been two days since we have seen Whiskers. I am NOT happy about this. We have an owl in the neighborhood and I heard the coyotes a couple of night ago. I sure hope they didn't become dinner. I sure hope they turn up soon.