 When a player fouls by failing to pocket an unpaired cribbage while on a succession of unpaired balls, only unpaired balls are spotted; the prior successful cribbages count toward the score.Normal ball and rail foul rules apply in cribbage.This is a requirement present in most pool games that a player must contact an with the cue ball and after that contact, either pocket an object ball, or some ball including the cue ball must contact a rail.