Cat Feces in Compost: Why You Should Never Compost Cat Waste

Livestock manures benefit gardens, but what about cat litter box contents? Cat feces have 2.5x nitrogen of cattle manure, similar phosphorus/potassium—but contain parasites and disease organisms with significant health risks. Composting cat litter is not advisable.

Can Cat Feces Go in Compost?

Toxoplasmosis—a parasite causing human disease—is excreted only by cats. Most infections cause flu-like symptoms; immunocompromised individuals and pregnant women face severe risks (birth defects). Cat feces also contain intestinal worms.

Composting doesn't kill these diseases. Killing toxoplasmosis requires 165°F (73°C)—most piles never reach this. Contaminated compost risks garden soil contamination. Scented litters contain non-degradable chemicals. Pet poop composting isn't worth the risk.

Deterring Cats from Garden Areas

Cats using your garden as litter box? Deter them:

• Chicken wire over vegetable beds—cats dislike walking/digging on it.
• Cardboard with Tanglefoot (sticky insect trap) at entry points—cats won't step twice.
• Motion-activated sprinkler.

Cat owners must prevent pet nuisance. Best: keep cats indoors. ASPCA notes indoor cats live 3x longer with fewer diseases.