I had a lovely card from the vet's practice after our beloved old dog was finally put to sleep. They had known her for a long time, and I appreciated it very much. I do agree that flowers are a bit OTT, though.
What did really upset me, when I was picking up my dog's ashes, was a new and very young receptionist who had never met me or the dog before, handing her ashes over with a bright and perky, 'There you go!' - as if she was handing over a tin of beans or something. I was in tears all the way home.
I really should have said something to the manager about more appropriate behaviour in future, since the girl evidently didn't have the sense to understand this for herself, but I never did get around to it.