Just read the specs on these George. Obviously a lot of safety considerations and precautions to take - as with any chemical weed control products.
Not something I opt to use - especially when you have a dog that runs freely about the garden, as in our situation.
It's very difficult to find products that are pet friendly.
We get dandelions and daisies growing through our lawn. Just have to cut it more often to lessen the visual impact when they pop up