I just called the vet, I wanted to wait until I knew they would have a shift change, and I asked to speak with the owner. The girl told me he was scheduled to be in on Thursday, so I am going to call him then and tell him about what happened.
I asked my mom if they did that to her when she took her dog in for her shots, and she said no, she would always tell them she wanted to go back with her and they would let her.
So I think that the lady in there today just thought she would get away with being a ***** because the owner wasn't in there.