Undercover footage shows calves receiving 'multiple blows' to head from workers using sticks
Activists protested against the transportation of livestock, as the temperature plummets, with wind chill values near -35 degrees Celsius
The incident resulted in 'traffic chaos' as some pigs temporarily escaped the vehicle
Activists joined forces Saturday to expose 'the greatest injustice in human history'
The minister described the transport practices as 'serious abuse'