Yeah, they are still contagious and shedding the virus out for 6 months after they have it. There is less of a chance of a dog catching it if it is a healthy adult and up to date on vaccinations. Puppies and older dogs, or dogs with health problems that cause their immune system to be down are a lot more likely to catch it.

Also, if the puppies come in contact with a healthy adult dog, that dog may not get parvo but that dog could carry parvo to another dog. There's about a 10 day incubation period of the virus so if she's had them for less than 10 days, they still may come down with the virus. Bleach kills parvo so I would bleach out every area the pups go to. Also when they go potty, take them somewhere where no other dogs will go because it can linger for months in the ground.