Thanks for the reply, HumaWorm! Puppies are one week old now...my husband normally worms them at 3 weeks when the mama has litters. I'm gonna try to hold out...I just got my HumaWorm yesterday and still have it in the wrapper-I'm dying to start on it though, and even my husband is "up for it". Maybe if I don't open it at all I won't be tempted to start it. lol