in my experience Parvo mostly only get s to puppies or young dogs, and yours being vaccinated gives you more chance to not get it (some dogs get it even vaccinated but itīs rare, at leats where i live)

youīve done right about the bleachng thing, but about the yard and all, there are something you just canīt control, itīs like a sick dog was just at the dog park and you never know about that, so everyplace could be exposed to parvo without one knowing...........so itīs good to have them on to date with vaccines against that one in particular...........

besides itīs more deadly on young dogs or puppies.........and adult dogs may get it and show little to no symptoms..........or just a slight fever..........

anyway keep an eye on them, and hopefully nothing happens...((hugs)) for caring about your pooches health