If you are planning to use pesticides or fertilizers on your lawn, you must think about the affect they may have on your cat or dog.  Keep your dog or cat (if he goes outside) inside for at least 24 hours after applying any chemical to your lawn. If he must go out, keep him on his dog leash and away from the treated areas.   There’s no need to panic. If applied properly, these chemicals can irritate your dog or cats paws but they rarely can poison a pet.  Clean up any pesticide spills. A puddle of the stuff could be dangerous to your pet.  Please note that research had shown an increase in cases of lymphoma  in dogs that were exposed to the herbicide 2 4 D. Make sure that you read all of the labels and take the proper precautions.