Police were alerted after activists blocked a road and began filming abattoir trucks.
The protestors were causing a nuisance to road users when police moved in.
Ten activists from the Save Movement for animals staged the protest in Spalding, Lincolnshire, UK.
They were carrying placards and filming trucks carrying livestock into the Pinchbeck abattoir run by Morrisons, a big UK supermarket chain.
Police attended the demo and forced one of the protestors to leave the scene after he obstructed the road.
A Lincolnshire Police spokesperson said: “Everyone has the right to peaceful protest and the role of the police is to facilitate that and prevent breaches of the peace.
“Unfortunately, the group who have assembled in Pinchbeck have not been behaving in the expected manner and have been obstructing the highway.”
David Brown, of the Spalding and Peterborough Animal Save Movement, said: “Our aim is to bear witness to the animals and highlight their plight. They are not just objects to be discarded. They are individual ‘sentient’ beings. We want to show people the consequence of eating meat.”