 The new item had originally met with disapproval from Kroc, but after its successful test marketing, he eventually agreed to add it.Another item that Kroc had backed a year previously, a burger with a slice of pineapple and a slice of cheese, known as a "hulaburger", had flopped (both it and the Filet-O-Fish were developed in Catholic neighborhoods where burger sales dropped off markedly on Fridays and during Lent).The market was not quite ready for Kroc's taste; the hulaburger's tenure on the McDonald's menu board was short.