Yes you see I noticed sheep were eating grass blocks to get their wool back. So figured I'd get grass by shearing it and bringing it to them to get their wool back. 

So why can't I get their wool back from feeding grass from hand. Is this a bug or something like it breaks my mind a bit. They can eat grass blocks but not from hand. I can see if you fed them with grass one time and have to wait on them to be hungry or something like a cool down for breeding them type of thing. But I haven't fed them grass at all. So did someone forget to put this in game?