I always remove the bright, yellow number tags from the ears of cows, sheep, and goats that I photograph. The tags are not only ugly, but they also remind me of how much easier it must be for their keepers to not have to think of them as living creatures – which in turn I associate with the mindset the Nazis had when they tattooed numbers on prisoners in the labor and death camps. Why not insert a discreet RFID (radio-frequency identification) chip somewhere on the cows/sheep/goats instead?