If you stop giving them water should fix the problemDown here they sell "dogrocks" that you put in the dogs water bowl , they claim that they filter out minerals that are concentrated by the dogs kidneys which burn the lawn . I haven't tried them but a friend has noticed less burn marks (not completely gone though) in his yard from using them .
http://www.dogrocks.org/index.php?pr=Home_Page
That could workIf you stop giving them water should fix the problem
not giving them anything to drink is a lot cheaper.
Not in my world...not giving them anything to drink is a lot cheaper.