Regrettably, un-fertilization is not possible. However, it doesn't last forever, and as we move into fall doggie burn will be less likely as temperatures drop and soil moisture rises. Those uneven spots will also tend to fade in if you're fertilizing correctly in fall. Some people train Fido to go in certain areas of the yard only, and simply give up that section to doggie damage. Over the course of several years, using high carbon, low nitrogen organic products will condition your soil to be able to handle the nitrogen fertilization from dog urine. We have two dogs, with up to three more visiting at a time (our dogs have more social life than we do), and no doggie burn. There's also no dark green spots in the lawn as it's well fed organically, and the organics bind the nitrogen and force it to release slowly. The whole lawn is dark green. That takes adding a lot of cracked corn and/or sawdust (horse bedding pellets) until the soil organic material rises...which does take time. Proper moisture in summer is key, as you found out. Essentially, you're diluting the dog damage down to a good urea-based fertilizer. Keep that up. While it would be theoretically possible to do that over the lawn area where the dog goes, it would be expensive--and wouldn't encourage the best conditions for grasses, so I'd recommend continuing with the watering can.

I live in the city, have a small lawn in front of my condo building that I maintain -- probably 10 ft x 40ft. I do not own a dog, but live in a very dog-friendly neighborhood. I would estimate we have 100+ different dogs walk by our building each day. Many of them like to stop to pee, as I take care of my hard and it is by far one of the nicest patches of grass around. You might think dog owners would notice that and try to keep their dog from peeing on the grass (when there are obviously dead spots from other dogs), or what irritates me even more is when the dog digs up the grass. We have a tree with a circle of dirt and pavers around it, and I posted a sign asking for the dogs to pee on the tree. I don't expect every dog owner to be able to control their dog to abide by that request, but the majority of people don't even bother to try. What I find most odd is how many people own dogs, and now with covid I see many fewer dog walkers, but the owners don't seem to pay attention to their dogs. Why do you have a dog and then act like you don't want it? I cannot control these dog's diets, I cannot control how much water they have (many are likely dehydrated because the owners don't want them to pee in their house). I cannot give them the various supplements recommended here. I do not fertilize the yard, and only occasionally do I use organic manure -- most of the time it sells out before I can buy it in the spring. The sugar trick sounds promising, I will give that a try. I also heard elsewhere that ammonia in a plastic bottle with some holes poked in it can allow the dogs to smell the ammonia might prevent them from wanting to pee to mark the area, so I will also try that. Plastic bottles filled with water aren't very practical to put around my yard -- and it would just look like trash, but I see how it might work for a garden area with different types of plants. I was hoping for something that I could treat the grass with that might last a few weeks.

Urine is just a highly concentrated form of nitrogen. If anything, it should encourage established or mature trees to put on additional growth. Young trees or saplings area different matter - the nitrogen is too strong and can burn but this is not an issue with any larger, better established plants. Most dog parks in my area (and I visit a lot of them frequently) cover the trails and main socializing area with bark or wood chips, similar to what one would do in a home kennel or dogrun. These absorb much of the liquid waste and are changed out or replaced when they become too soiled - leaching into groundwater or streams/lakes is not an issue. Solid waste must of course be bagged and properly disposed of.

I've read that females tend to cause more turf problems. The composition of the urine is somehow more destructive and because they squat, the urine is concentrated tightly in one spot. I think it was my post you were referring to. I have a TTTF lawn with some remaining other fine fescues that preceded my TTTF overseeding. My 7 month old TTTF doesn't seem to be harmed by the pee now and instead just gets a big flush of top growth. Right now nothing at all is growing in the burned spots, which are about 2-3 inches in diameter.