If you need mutton and have Valguero map installed,you can tame them in Chalk hills. They're almost everywhere in there,you can cryopod them and transfer them where you need.
Ovis
The ovis is a sheep-like creature that many survivors find useful in farming. It can be found in the grasslands. While rare, it can be tamed simply by feeding it one Sweet Vegetable Cake. This sheep can be sheered with Scissors to obtain Wool, or killed to obtain Mutton. While the ovis can be mounted, it is not an ideal mount for transport and provides very little use once mounted, other than its ability to climb up steep inclines.
Player-written tips for taming, using, and fighting the Ovis in ARK: Survival Ascended & Evolved.