Answer: Unfortunately, as long as your dog continues to use that area, new sod or seeds aren't going to take. You might want to consider removing the lawn if it is unsightly and putting bark chips or something similar that wouldn't show the problem.
Here is a website that contains more than you ever wanted to know about dog problems on the lawn:http://aggie-horticulture.tamu.edu/plantanswers/turf/dog_lawn_problems.html.
You might want to consider training the dog to go elsewhere if possible, and then revive the lawn. Good luck!
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