Yeah, when I had Cassy and Sassy (RB) chipped it was while they were being neutered, so they were already under sedation. Livvy got chipped when she had her annual shots shortly after she joined us. It did seem more painful for her, but not a great deal so and she was moving smoothly within 24 hours (… if that's any help?) She had a history of sneaking out of her previous home - hasn't happened since she came to live with me, knock on wood, but that was a big factor in my getting her chipped.