
My GSD boy LOVES tea. He will steal it out of cups left within range, and I occasionally treat him to a small bowl of weak tea with the tiniest splash of milk. My other GSD isn't that bothered. But if you say to Indy 'want a cup of tea' he starts drooling

I must stress this is very very much in moderation.
My very first dog was a very very sick puppy when she and her Mum and littermates were rescued, and the vet really didn't think she would make it. So he said to the lady fostering them (presumably joking and having no other treatment to offer) 'just pray and give her lots of tea'

She took him literally and did just that, and the pup survived. She came to me at 9 weeks old and very feisty (though still full of worms) occasionally had a little drop of tea which she loved for the rest of her life which was 16 years, without one vet visit apart from her spay and vaccinations.