No, not all weed killers for lawns are safe for pets. Some products have harmful chemical ingredients that shouldn’t be used near pets, vegetable patches or flowerbeds. Again, it's advised to research what your herbicide contains to ensure the safety of your pets and children. If you want a product that’s safe to use around pets or children utilize an organic herbicide. An organic herbicide won’t have any harmful chemical ingredients. All-natural herbicides are excellent to use if you want to fertilize your lawn while eradicating weeds simultaneously. Organic herbicides will feed your grass nutrients while preventing weed growth.