On aberration go to fertile land and you'll see at least 10 of them! On the other maps... Less
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.
Apparently with just one veggie cake you can tame instant any level, passive tame, feed from your last slot. Bette get higher level and chop them with a good pick or dino. Keep something around, the amount of whool they give when they die is legendary