Hello there and welcome to the forum It's not possible to say, it depends on so many things including the level of infestation and how many times the puppy has been wormed - and all sorts of other things. All young puppies need a programme of treatment for roundworms - your vet should be able to advise - and adult dogs need treating at regular intervals too. There is an article here: http://www.thelabradorsite.com/worms-in-dogs-how-to-keep-your-labrador-worm-free/
Thanks,Che just got a booster shot and second heart and flea treatment last week and that is when we started seeing in his stool. Hopefully it will not be much longer.
