Answer: There are a few products on the market that claim to neutralize dog urine, but I don't have any experience with them so I hesitate to recommend them. You might check with your Vet.
It's a far better idea to treat the grass, rather than the dog when trying to avoid the urine burns on your grass.
Frequent watering, or, even better, soaking the grass the grass after your dog has eliminated, will help prevent the burn spots from appearing by watering down the nitrogen from urine.
Small areas will often regenerate on their own over time, but in areas with a short growing season, this could take the equivalent of entire summer.
Re-seeding the grass after it has been burnt can be done, but be sure to water the area down well, before and after reseeding, and consider covering it with netting, or a clear lastic sheet to prevent the birds from making off with your seed.
Another great idea, if you'd prefer to not have to repair the problems all summer long, is a designated bathroom area. You can keep a small, gravelled area, or a cement block, or plain dirt, or even dead grass, and train your dog to go there, and only there. As you may have thought, gravel or loose sand or dirt is best for this. When it's time for her (or him) to go, take her outside, on a leash, and lead her over to her new bathroom. When she stops to urinate (you may need to stand there for a while, especially if it's a surface she's not used to), praise her loudly and excitedly for going in the correct spot.
If she stops to go in an area you are trying to keep green, distract her immediately, issue the "NO", and lead her to the new spot. This does mean you'll have to escort her out for quite a few days, complete with treats and praise for going where she should, until she gets the idea. Just make sure the area is large enough to accomadate shifting, and keep clean so she isn't tempted to wander off to cleaner pastures.
Best wishes with your dog and with your lawn.
Q&A Library Searching Tips