They were born last month on a beef farm at Nelsons Plains and their arrival has been a huge shock.

But not for the reasons you might think.

Normally twin calves are very rare on cattle properties, but on this farm there is clearly something strange going on.

The siblings are one of six sets of twins that have been born on the farm this year.

It’s a scenario farmers Peter Manuel and Angie Williams are struggling to comprehend. 

There is no explanation for it and after such a severe drought they say it’s a miracle that all of them survived.

Their personalities are already starting to show. Mickey is very protective of his sister and is clearly the more outgoing of the two. 

Minnie is quite reserved, but once you get to know her she becomes very cheeky and curious.

Mickey strummed up the courage to inspect the camera and have a good sniff of the lens to make sure it wasn’t food during the photo shoot. 

Mr Manuel said Mickey was clearly the stronger twin – he is a little bit larger. 

Both share the same brown marking on the left side of their face and the slight difference in the colour of their coat is their only point of difference, other than their sex. 

Mr Manuel said fraternal twins like Mickey and Minnie were always born infertile, while fraternal twins that were the same sex went on to produce healthy calves.

He has the odd twin cow in his herd, but ironically none of those were responsible for producing the twin calves.

The huge amount of twins initially caused a lot of confusion.

After the first two sets were born in the paddock without incidence Mr Manuel spent hours trying to work out who the other mother was.

He was shocked when he realised that both calves belonged to the same cow.