We have got an 11 week old Chihuahua pup. We have wormed her the last 3 days with Panacur paste. She is passing loads of large worms in her poo. Is this normal or should I carry on worming her for another couple of days. She is very tiny and we obviously don't want to do the wrong thing and make her ill. She is going to the vets on wednesday for her second jab, but of course we will take her sooner if necessary.

A wormer makes the worms come out, at least you know the wormer is working just follow the instructions what your vet has given you in regards to the pancur paste.

Warm regards Susan.

Do not give more than it says on the instructions as this can kill a pup.  As "frank" says if the worms are coming out you know that the wormer is doing it's job :d

Agree with other 2.
I would seek vets advice on when next to worm - If it was me I'd do another 3 day course of panacur in 2 weeks time.  :)