How about just using a hose and spraying down the area, hoping to wash away
(dillute) the urine. Or set a sprinkler to run for a few hours.
If that fails, get a bigger yard or a smaller dog.
good luck,
Matt in MI

"Bob" wrote in message
...
Hi,
I have a small fenced in grassy area next to my home for my dog to roam
around in. Lately with the summer heat it has developed the sour smell of
urine.
Does anyone know of a simple treatment for this that is not harmful to my
dog?
Thanks