Pet waste composting is possible but requires a dedicated system separate from your garden compost. Dog and cat feces contain pathogens including roundworm, hookworm, toxoplasma, and harmful bacteria that standard backyard composting does not reliably eliminate.

The key distinction is temperature. A standard compost pile reaches 90 to 140 degrees Fahrenheit, which is insufficient to kill many pet waste pathogens. Safe pet waste composting requires sustained temperatures above 165 degrees Fahrenheit for several days, which is achievable with a well-managed hot composting system or a dedicated pet waste digester.

Pet waste digesters are the simplest home option. These in-ground systems work like a small septic tank. You dig a hole, install the unit, add waste and a digester enzyme or septic starter, and the waste breaks down over weeks into a liquid that leaches harmlessly into surrounding soil. Place digesters away from vegetable gardens, water sources, and areas where children play.

If you prefer traditional composting, build a separate bin exclusively for pet waste. Layer feces with high-carbon materials like sawdust, straw, or shredded newspaper at a two-to-one carbon-to-waste ratio. Turn the pile weekly and monitor temperatures with a compost thermometer. The finished product should cure for at least six months and must never be used on food crops. It is acceptable for ornamental plantings, lawns, and non-edible landscaping only.

Do not compost waste from pets that are on medication, recently dewormed, or showing signs of illness. Cat litter is generally not compostable unless it is made from plant-based materials with no clay or silica. Even then, toxoplasmosis risk from cat feces makes composting cat waste more hazardous than dog waste.

Alternatives include pet waste pickup services that dispose of waste responsibly, flushable waste bags for dog feces only, and municipal green waste programs in select cities that accept pet waste.