[kala]

From what you wrote I don't think she is aggressive. You said she grumbled at the vet as he did invasive handling of her abdomen, but when he stopped she reconnected with him and was good. That's what you want, maybe not the growling at first but the reconnection. She didn't like the handling in the "back". Maybe they hugged her neck when they were doing the blood draw, I see lots of dogs not wanting to be held down like that. Next time ask they don't take her away from you when they do anything to her. You just got her, she is still probably unsettled from all the changes in her life.

I had a Rottie girl that was aggressive at the vets. She didn't want anything to do with the techs or the vet. I always requested a muzzle or took my own for her. Away from the vet's office she was a dream girl. She loved to meet new people and was of a stable temperament. Just learn to know your dog.

You admit you need to work with her, but you have time to get her into training. She will learn. As others here say a lot of dogs are not comfortable at the vet's office. I wouldn't worry about this one incident or tech at the moment. Just get to know her and start working on her training. Sounds like you are on the right track.
sue