Dogs, mirrors, self awareness...

From what little I've seen about it so far, it looks
to me like some people actually believe dogs are not
aware of themselves simply because they don't appear
to recognise their reflection in a mirror. To me that only
means they don't understand a mirror, and has absolutely
nothing to do with whether or not they have a mental
concept of themselves.

The facts that they have a mental concept of their
objects, their territory, their urine, their body, etc, are
all indications that they have a mental concept of
themselves, imo.

The fact that they are aware of different individual
beings is a very strong indication that they are aware
of themselves as an individual also imo, especially
when considered along with the fact that they have
a mental concept of the other things they encounter.

Question: Has anyone ever managed to get a dog
to understand that it can see its reflection in a mirror,
and if so, did it appear to experience a great revelation
about its own existence at the instant it learned to do so?