You can also use the Humaworm formula for pets. You only have to give it twice a day for 5 days. Humaworm has a forum on here and answers lot of questions. My dog and I have just started another round of it this past Friday. My dog will be finished tomorrow morning. She doesn't necessarily have worms now, but I will probably continue to give it to her maybe 3 times a year. After giving it to her the first time, she started eating more and acting more playful. Also one of the enzymes in her bloodwork was very high, along with a couple other items. A high number means either liver problems or parasites (I looked this up online). She had bloodwork done again recently, and the high levels are now normal.
You can either go to the Ask Humaworm forum or go to humaworm.com to read more on it and order it. It's pretty cheap, too.