They do not spawn naturally. You must find a Name Tag, use an anvil to set the name to 'jeb_' exactly like that, and use the tag on the sheep. Its wool will then cycle through the available colours, but if you kill/shear it, the wool it drops will be the original colour.
Chat with our AI personalities
Name it _jeb with a name tag.
go outside
Sorry, you can't, unless you make use of a mod.
no
You can make bread, cookies, cake, and feed it to cows, pigs, chicken, and sheep to make them breed.