Since I am a buffoon and still believe that I can train a cat to feed itself-I have a question about the ear clip on cats that are neutered/sterile.

I am looking towards trapping the girl cats of my harem and having them sterilized. I noticed that one of the cats has an ear 'clipped' in the way that feral cats who have already had sir jury.

I have to catch the cat, but I wanted to know if it's either ear clipped or one side only?

Thanks!