I'm not the greatest at math but I just suspect that you will find six doves on, or near your feeder this week.
There were seven slick doves on the feeder I say, seven slick doves in a group, if one of the doves should then become prey there would be six slick doves on the feeder I say, should still one more of those slick doves become prey, then there would be five slick doves on the feeder today.