The Sheba Mini Yak Guinea Pig takes its whimsical name from its resemblance to a miniature yak, with long facial hair forming distinctive mutton chop-like whiskers and a perpetually tousled coat growing in multiple directions. Developed in Australia during the 1970s, this breed is often affectionately called the "bad hair day" guinea pig for its charmingly disheveled appearance.
The breed originated from crosses between Peruvian and Abyssinian guinea pigs, combining the longer hair of the Peruvian with the rosette patterns of the Abyssinian. This genetic combination produces the characteristic coat that refuses to lie flat, growing forward over the face and outward from multiple points across the body. The result is a guinea pig that appears perpetually windswept.
Sheba Mini Yaks remain relatively rare outside Australia, where they enjoy dedicated breeding programs and show recognition. In other countries, they may be classified under various rough-coated or miscellaneous categories depending on registry standards. Their unique appearance attracts enthusiasts seeking guinea pigs with distinctive character and visual interest.

