I am not sure why their ears do that. I dont think it has anything to do with the tattoo though. Sometimes his ears are normal or sometimes they are both up. They cant make up their mind.
I did look up his tattoo information and from what it said on there he has some famous racers in his history. His Grand Sire has recently passed but they still have vials of his sperm they are selling for breeding and it is a crazy amount of money! I tried to join a Greyhound forum just to learn how to read everything but they have some crazy rules about email domains and I dont have an email address that fits their requirements.
And thanks for all the kind words. He is a wonderful dog! I would recommend adopting one if you want a nice chill dog that follows you everywhere! I am so happy with him!