Perhaps they were missing their little insect-sized passports.

Calgary Stampede organizers say there will be no cockroach pizza on offer this year because the cockroaches have not been allowed to cross the border.

Cockroach Pizza was among the promised new extreme menu items up for sale at this year’s 10-day Stampede. The dish -- a slice of cheese pizza topped by crunchy protein-rich cockroaches -- was to be this year's answer to 2014's Scorpion Pizza, which wound up being so popular, it sold out.

But with no Canadian cockroach suppliers ready to handle a Stampede-sized order, organizers turned to a supplier in the United States.

Stampede spokesperson Jen says the critters got held up at the border and won't make it to Calgary in time.

Those lamenting the loss of the cockroach concoction can still find plenty of other odd culinary offerings this year, including a Kobe beef-smothered, cognac-infused, lobster tail-garnished $100 hot dog.

There's also a glazed donut grilled cheese, red velvet chicken strips, peanut butter kabobs and more.