Ok so I get why puppies need wormed if they have them. This may sound stupid but, if the mother has been sufficiently cared for, wormed and kept of parasite preventative how do they puppy get worms if the mother doesn't have them. In this situation I am assuming that all the animals are kept indoors not in a kennel /outdoor situation. A friend of mine breeds collies and told me all puppies need wormed?!?