The dog waste yards will contain grass which is a better or 1of the best sources for the litter of a dog

Dogs need roughage in their diets and grass is a good source of fiber. A lack of roughage affects the dog's ability to digest food and pass stool, so grass may actually help their bodily functions run more smoothly.

Dog Litter Box
Best For
#1 Pick: DoggieLawn Disposable Dog Potty
Real grass bathroom pads is the choice for the Waste to be controlled in parks.
#2 Pick: Klean Paws Indoor Dog Potty
Plastic grate tray
#3 Pick: Sonnyridge Easy Dog Indoor Potty
Artificial grass pad
#4 Pick: PuppyGoHere Litter Pan
Litter pan