Never mind the chem-any-fucking-thing. your lawn does not need chemicals, it needs your care. Try this link for some information on lawn care:
http://www.local-motion.org/greengrass.html
Really, it's a bit more work to get your lawn to be care-free this way, but once it is, it's less work than before, and you can EAT it if you want to. Safe for dogs? Yup, and kids and the planet. Really, go green and you'll be so glad you did, and don't go back to the chemical sprayers, they're not worth the money, or the carcinoma, really.