There Aint No God For Dogs Chords

I hope this sounds right if you can perfect it feel free to help a brother out.
Ok so it just is the same four chords the whole song, Am,Em,G,C, to see how to strum it
up the video on youtube.
 
here's the first line with the chords, its the same the whole song with the oooo and
too.
 
Am              Em   G   C
I'm a good old dog  Oooo ahhhh
Runnin' down the road
Barkin' at the moon
Runnin' Wild
 
I'm a good old dog
Got nothin' to do with any of you
Caress my head, and I'm yours for life
I kill anybody that's hurted you
 
Headlights in the road
Headlights make me blind
I got nothin' to do with any of you
Two great spots of light
 
Good old dog never knew a thing
Wasn't no pain, just the sound of the crack
Bones cracking beneath the tires
Would have killed anybody that hurted you
 
There ain't no god for dogs (x4)
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