First, the triple strike will kill your grass too, so stay away from
Clover is one of the more difficult weeds to kill. Triclopyr is
effective, though it will likely take two applications. Usually clover
isn't a problem, unless there is a lot of it.
As for the crabgrass, Acclaim is very effective. The younger the
plants, the easier it is to whack.
Personally, I would probably wait a week and then till a good rain
before I let the pets out on it.
If the lawn is a real wreck and you are considering reseeding, then
it's probably not worth the $$ and effort at this point. Don't wait to
reseed in Spring. Late summer, early Fall, Sept for much of NA is
optimum. You can kill the existing vegetation with Roundup and reseed
a week or two later.