Knock KnockWho’s there?Heifer!Heifer who?Heifer cow Posted on November 26, 2017November 26, 2009 by admin Knock KnockWho’s there?Heifer!Heifer who?Heifer cow is better than none! Spread the love Related posts: Knock Knock 68 Knock KnockWho’s there?Warrior!Warrior who?Warrior you Freeze Roses are red