on the shelf.. does anyone know why and what else can i use to treat them?

I have a puppy i recently bought and yesterday when he pooped a worm like this one http://www.beaglesunlimited.com/Photos/CanineRoundworms.jpg
came out
i was told by someone that if i boil a garlic in water for about 10 or 15 minutes and then gave the water to my dog(when it cools down of course) it can kill the worms so is it true?

IM NOT GOING TO DO THAT TO MY DOG
IM GOING TO TAKE HIM TO THE VET TOMORROW MORNING TO GET A CHECK UP AND ALL HIS SHOTS

SO IM JUST WONDERING IF ITS TRUE
LIKE I SAID IM NOT GOING TO DO IT TO MY DOG I WAS JUST ASKING

AND I WAS TALKING ABOUT THE WATER USED TO BOIL THE GARLIC NOT THE GARLIC ITSELF