dog urine out of a carpet

i saw this online ive heard this as an old wives tale, but in talking to other carpet cleaners there seems to be a grain of truth in the process .
http://www.ehow.com/how_4901349_rid-urine-carpet-odors-vinegar.html

i always find that dog urine is a toughie , get it sytraight away you may stand a chance, ive done alot of jobs where stains have been there for monthes and the reality is forget it. A good neutralizer will get rid of the smell.

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