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9 July 2014, 19:33 | Updated: 9 July 2014, 19:46
The nursery rhyme goes ''Mary had a little lamb'' - only this one at Noah's Ark Zoo Farm in Wraxall is, well, dinkier than usual - and arguably cuter.
Tiny Tim, as he has been affectionately christened by keepers, came into the world on Friday July 4th.
But the same day, his mum - now called Mary - also gave birth to a normal-sized brother.
It is almost like the agricultural version of the movie, Twins, where Danny De Vito and Arnold Schwarzenegger discover they are related.
Even though Tim is little, keeper Marc Roberts says that it was "a big surprise to see such a tiny lamb."
He adds: "Tiny Tim is a real star now. As keepers, we get so used to seeing live lambing and bottle feeding the newborns that this made a real change.
"I’m glad to say Mary, Tiny Tim and his brother are doing very well."