We do a worming treatment three times every litter. And we also treat our own hounds at the same time, just in case. Worms aren't really a big problem, especially if you stay on top of things.
This morning was treatment one, the first thing they've tasted that wasn't from Mom. They will get their first puppy chow soon so worming now means better digestion once real food shows up. We're watching for them finding the water dish. Once they find it we can begin suuplimenting Mom feeding with something a bit more solid.