A McDonald’s advertising agency has copied the work of cult animator Cyriak without paying or acknowledging him, it has been claimed.

The fast food giant faced a huge backlash after the Hampshire-based digital artist alleged his video called ‘Cows & Cows & Cows’ which has racked up more than 37million views on YouTube, has been plagiarised.

The 41-year-old, whose full name is Cyriak Harris, has directed music videos for electronic artists Bonobo and Bloc Party, and his artwork has been commissioned by the likes of Coca-Cola.

He posted on Twitter: “Wonder how much @McDonalds paid someone to copy my video. I didn't even get paid to make the original”.

Mr Harris, who is highly-regarded by comedian Adam Buxton and satirical duo Cassetteboy, is a self-taught digital gif maker who studied hand-drawn animation at school.

He told The Independent: "Plagiarism in the advertising industry is a problem for artists and it should be a problem for advertisers as well, because each of them depend on the other to a certain extent.

"I have done plenty of work for advertisers and in general it is a relationship that works well, but there will always be a grey area in copyright where influence and homage and reference exist.

"I've had a few occasions where adverts were clearly influenced by videos of mine, but there is a sliding scale from vague similarity all the way to blatant rip-off which makes the legality of it a bit fuzzy."

The advert was for McDonald's in South America extolling the milk used in its ice cream.

It appears to have been made by a small Buenos Aires animation studio called Juan Solo.

A user called LeandroPedrouzo posted on design forum NewTek that Cyriak was the inspiration behind the cows.

Complimenting the design, one person wrote: “It is very nice!...The cows remind me of Cyriak.”

LeandroPedrouzo responded: “Actually Cyriak was the reference for this spot.”

"Spot" means the advert itself, and the reference is example videos or images that the ad agency gives the creatives as a guide for how they want it to look.

A Leandro Pedrouzo, listed on the website of the agency, has been contacted for comment.