I do feed raw (which means more nitrogen in the urine, not less) and her water is filtered through a paramagnetic basalt water filter (which is similar to Dog Rocks' main ingredient) and the grass is Buffalo. The lawn is still covered in drown patches in dry weather.
I am puzzled by the use of Dog Rocks, to say the least. On their (very amateurish) web site they claim:
"Dog Rocks® filter out impurities from water such as Tin, ammonia and nitrates. These impurities are usually passed out through urine, and when your grass comes in contact with these elements it is burned, resulting in a dead, yellow patch on your lawn."
If this were true, then watering your lawn with tap water would burn it!
It is an absurd claim. A total failure of logic. Absolute bunkam.
If Dog Rocks work at all, it is certainly by some other mechanism.
The claim is ridiculous because the level of Nitrogen in fresh or even tap water is TINY - a few ppm. If it were higher, it would be toxic. By contrast, the level of Nitrogen in urine is huge - 1% in humans and no doubt far higher raw fed dogs. So the amount filtered out pre-ingestion by Dog Rocks, or by paramagnetic water filters, will be negligible from the lawn's point of view - so tiny, in fact, that it would be impossible to measure.
Almost as peculiar is that the Dog Rocks people offer a document on their web site - 'Lawn Burn Explained' - by McGill University that gives no support to Dog Rocks at all!! It says:
"The concentration of nitrogen in the dog's urine depends on the type of dog, its sex and what the animal eats. ...diets high in protein can cause nitrogen concentration in the urine since protein breaks down to release nitrogen compounds.Further, Dog Rocks claim their product "does not change the pH balance". I question this strongly because I have used paramagnetic basalt rock for re-mineralizing the garden and it is very alkaline. This is not necessarily a problem, but the claim may be wrong.
... So how do you prevent the appearance of these unsightly patches? There are two ways - change the nitrogen concentration of your dog's urine or focus on the lawn. You can start by changing the dog's diet. Feed the dog food with lower protein content so there is less protein and subsequently less nitrogen in the urine. ... Or you can deal with the lawn directly by spraying the patches with water or treating them with gypsum pellets... You may also want to designate a certain area of the yard,...
Finally, if all else fails and you simply cannot tolerate those yellow spots any longer, there's one last option. You may want to consider getting a cat."
- Dog Rocks probably does no harm, provided the company is not hiding any ingredients, and may even be quite healthy for the dog.
- Dog Rocks cannot possibly work in the manner claimed by the company! Even a junior high school chemistry student could confirm this, which makes the company look incredibly bad.
- If Dog Rocks work at all, it is by some other mechanism, or due to undeclared ingredients. The web site, unfortunately, is not explicit about the product ingredients.
- The absurdity of their claims makes it clear that they have no idea what they are doing. I would not trust such people with the health of my dog, even if the product perhaps works, somehow, for the grass.