Farm animals that are in a sanctuary environment, that will never be entering the food chain nor being rehomed I don't believe need to have ear tags nor slap marks or tattoos for pigs.

I believe that ear tags are pointless in a sanctuary, they must be extremely annoying, they can get infected, tags are caught and pulled out. I understand the government want a tractability system in place but microchipping will allow all the information that is needed to be on the microchip.