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How to repair spots from pet urine in lawn grass
Identify spots caused by animal urine.
Dead spots in your lawn caused by animal urine will be round, and generally all in a single area of your yard. The individual spots may range in diameter from a few inches to over a foot.

Choices:
[1]. Either way, you'll need to look for spots that may provide specific directions to follow along the stem of your grass. Old spots of upholstery under car doors, on fence posts, and other round spots are more common..
[2]. If dog urine is present in the area, you may see several piles of grass mixed with animal urine. These piles should be scuffed away so the smell does not linger, as well as any noticeable stains on the grass..
[3]. The size of non-round spots is 1-12. Multiply this number by 10, and the number of spots only in slightly smaller areas of your lawn can be fixed..
[4]. Dogs especially tend to habitually urinate in a single area. Animal urine is not the only agent that can cause lawn damage and dead, brown spots of grass..
Answer:
[4].