CALGARY, Alta. — A cow that violates the new import rules set out by the U.S. has been trucked across the border, causing some alarm.

Meat from the cow, which was older than 30 months of age, has been recalled by a Wisconsin beef plant, CNN has reported. The cow in question was cleared for import but a Canadian audit found it was too old to be shipped into the U.S.

The new restrictions don’t allow cattle over 30 months of age to be shipped into the U.S., as the risk of mad cow disease increases with age. The Canadian Food Inspection Agency says it is investigating the incident and has suspended the veterinarian who certified the cow.

The cow was shipped into the U.S. from Ontario, and officials say it wasn’t the only animal on that truck that shouldn’t have been allowed to cross. Eight pregnant cows were also on the truck another violation of the U.S. restrictions, say Canadian and U.S. officials.

About 40,390 Canadian cows have crossed into the U.S. since it lifted the ban on live cattle in July.