This cow's great-grandfather was a heroic knight. His name was Sir Loin...
(This puzzle is logical & tested, but requires an advanced technique called 'cornering' to get started. I would have put a 5-star difficulty on it but I can't figure out if there is a way.)
Symmetrical would be a better clue.
Yes, the puzzle is symmetrical, but entirely possible without assuming this (I always first try to see if puzzles are possible without making any assumptions whatsoever).