Cats and lawn pesticides: what is different from dogs

Based on EPA labels and sources cited below, last checked November 4, 2026. Always follow the label on your product.

Short answer: the labels we checked use one rule for all pets. NPIC says cats are more sensitive to permethrin, a pyrethroid insecticide, and that dogs may be more sensitive to 2,4-D.

How pets are exposed

NPIC says pets may be exposed to 2,4-D by touching plants still wet from spraying and then grooming their feet or fur, by drinking the product, or possibly by eating treated grass. NPIC says pets may be at risk if they touch or eat plants still wet with glyphosate spray.

DogsCats
Ingredient concerns noted by NPIC"Dogs may be more sensitive to 2,4-D than other animals""Cats are more sensitive to permethrin than dogs or people"

Pyrethroids and cats

NPIC says cats take a long time to break down permethrin, and cats exposed by accident to products with high (45 to 65%) permethrin can have tremors and seizures and may die. The pyrethroid sprays on this site contain bifenthrin and cypermethrin, not permethrin (Ortho Home Defense is 0.05% bifenthrin and 0.0125% cypermethrin). NPIC does not state the same cat sensitivity for bifenthrin, so we do not claim it. See bifenthrin.

Perimeter sprays inside the house

Products like Ortho Home Defense include indoor uses such as baseboards. The label lets pets back after the spray has dried.

Garden beds

If you used Preen or another bed product, keep cats out until it is watered in and the surface is dry, as the label requires.

Pet flea products

Outside lawn care, but worth saying: NPIC's permethrin fact sheet describes cats poisoned by accident with high-permethrin products. Use a pet product only on the animal its label allows, and ask your vet.

For every label re-entry rule we have checked, see the lawn treatment plan.

Questions people ask

Are lawn chemicals more dangerous for cats than dogs?

For some insecticides, yes. NPIC says cats are more sensitive to permethrin than dogs or people because their bodies break it down slowly. For the weed killers on this site, NPIC does not say cats are more sensitive, and NPIC says dogs may be more sensitive to 2,4-D.

My indoor cat never goes outside. Should I worry?

Some products are labeled for indoor use. The Ortho Home Defense spray label, for example, includes baseboards, and its rule is that pets may re-enter after the spray has dried.

Sources