Lawn treatments which are safe for dogs?

[Rudey]

Gardening pro's/dog owners: do you know of any feed and weed lawn treatment (particularly dandelions and thistles), which is safe to use with dogs immediately - or something that has a very little period to keep dogs off the grass please?

Someone told me to use salt/cider vinegar on the dandelions, but we have already pulled them up.

Thanks in advance