Dog CPR 
I saw a very touching story on TV the other day, where a Dog had a
Heart Attack (I think) during a Group Training Meeting. The Trainer was
shown doing CPR on the animal, who because of his assistance,
recovered.
I retired from a career in Health Care, and I must have be CPR Certified
over Fifty times throughout the years. The most important things I
remember, is "keep it up", and "watch out how aggressive you get".
Needless to say, compression depth and the respiratory pressure you
can develop, can be damaging to certain individuals. Those being,
Older people, children and baby's. This type variation, applies to the
size of Dog, which may require CPR as well.
I've seen several "how too's" and video's of Dog CPR, and given a few
references below. Some say that when you set up for a respiratory
assist, that only one breath is necessary. I've always disagreed with that
on humans and would apply that to a Dog as well. As long as you have
everything set, why not give a couple of breaths. That will only assure
a higher Oxygen Level in the Lungs, and it only takes a half second to
perform. Assuming you are "one on one".
One of the (minor) mistakes one makes, when learning how to do CPR,
is in the repeated respiratory pulses. It's almost normal when doing
a series of two, for one to blow in, then inhale with out separating
and turning his head, which would allow the Co2 from the patient,
to discharge to free air. When turning your head, you then inhale
fresh air, rather than taking in the exhausted breath from the patient.
Here are a few links, which may be of help...
How to Give A Dog CPR | eHow.com Dog CPR how to give a dog cpr - Yahoo! Video Search
If you find something that you feel is helpful, please post and link to it.
One final thing, and please don't think I'm bragging, but...
Over the period of years, I must have done CPR on a person, well over
a hundred times. God blessed me, and the situations I think, and I have
never lost anyone. I say this, remembering the feeling experienced
when you hear that first "gasp" for air, of the person responding.
Let me tell you my Friends,
it don't get any better than that ! 