These ‘bodybuilder bulls’ would make Arnold Schwarzenegger proud

A video of two enormously muscular bulls lumbering across a field has gone viral on social media and with bodies that bulge and ripple with muscle, the livestock look like the Arnold Schwarzenegger and Dorian Yates of the animal kingdom.

But the clip of the ‘bodybuilder bulls’ has divided users, with some believing their incredible muscle mass is a consequence of steroid injections and not mutation.

This should be illegal to inject so much hormones and steroids into any animal it takes it out of its natural healthy looking character. This is sick and sad wrote one user.

You don't want to give this bull any bull

A rodeo cowboy’s worst nightmare (Picture: Downvids)

Another replied; ‘This is a belgian breed of cattle that looks like this because of a genetic mutation that results in increased muscle mass!!! So stop this steroid and animal cruelty nonsense.’

There’s no doubt that some cattle are injected with anabolic substances to produce thicker, leaner meat, but there are breeds – such as the Belgian Blue – which have more than double the muscle mass of others due to a gene that suppresses the muscle-inhibiting hormone myostatin.

And this genetic anomaly is not just restricted to bulls. Wendy the whippet, a dog with the genetic mutation, made headlines in 2007 for her Herculean physique.

Examples of the mutation have even been seen in humans. In 2004, the New York Times reported the birth of a German boy with muscles twice the size of the average newborn.

It has not been confirmed what breed these bulls are, nor where the footage was taken