Animal Waste Put in Garbage Place all cat and dog droppings and kitty litter, along with their plastic bags, in the brown trash cart where they belong. Keep pet droppings and kitty litter out of the blue recycling cart, out of the GreenCycle! cart, and out of your home compost. Before mowing your lawn, clean up the dog droppings so that they do not end up in the GreenCycle! cart along with grass clippings. Note: Biodegradable/flushable doggie doo bags should never be flushed down a toilet. If you use these bags, make sure they go in the trash. Pick It Up Many pathogens in pet waste are harmful to humans and other animals. When left on the ground, pathogens like Salmonella or E. coli can leach into water systems. Be sure to pick up your pet waste every time. Don't Compost Waste Don’t place pet waste in commercial or backyard composting, even if you are using compostable bags. Doing so transmits diseases and invites animals to rummage through any backyard compost pile. Never Flush Cat Waste Down the Drain Cat waste can possess especially toxic pathogens. To reduce pollution to water streams, the best way to dispose of pet waste is to bag it and throw it away.