Anyone with a dog and a lawn knows the pattern: patches of grass turning brown or yellow in exactly the spots a dog favours. It is one of the more visible side effects of owning a dog, and most of the fixes people reach for involve changing the dog's diet or medicating it in some way.

Dog Rocks work differently - the rock itself sits in the dog's water bowl rather than being given as a supplement, and the manufacturer describes it as non-medicinal, with no change to the pH balance of the pet's urine. It is a 100% natural igneous rock, and the whole method is simply placing the contents of one pack in the water bowl.

• 100% natural igneous rock
• Placed directly in the dog's water bowl
• Non-medicinal - does not change the pH balance of urine
• Aimed at reducing urine burn marks on grass and plants
• Safe for all household pets, no need to medicate

• 200g pack

One thing worth knowing. Because this is a rock placed in water rather than a supplement or medication, we have no information on how long one pack lasts or how often it needs replacing - that's not something the maker has told us, so budget for it as an ongoing cost rather than a one-off fix.

Who it's for: owners tired of brown patches on the lawn who want to try something before reaching for a dietary change, and want a non-medicinal option that goes in the water bowl rather than the food.