We're finding out: When and where you should leave a tip

A new study found done by CreditCard.com found millennials are not tipping enough, finding nearly two thirds are tipping less then the standard 20 percent. So just when and where should you tip?  One person you may not think needs a tip is your dog groomer, however the co-owner of Bingo Institute of Grooming, Brian Lane, says dog groomers work off commission.