Hi,
I have just got a westie pup, he is 9wks old. I was given the vets record for him with info about his first in set of injections. The vets card also stated he had been wormed. I noticed thin white worms moving about when he had been to toilet so after advice from vet purchased milbemax worming tablet from vets. This was given to him 3 days ago. There were quite alot of the same kind of worms coming out after worming and i noticed there was still a worm today after he had been to toilet. Is this normal for them to be still coming out after 3 days? I have another westie who is 1yr old bitch, she has been wormed regularly since i got her the last time being approx 1 month ago. Is there any way she can become infected because puppy has worms? Should she be wormed again or just as normal?
Thanks for your help.

Sounds as if he has really bad infestation of worms. You will need to keep worming him at whatever intervals the tablets say they should be given (usually 2 weeks) as the worms have a lifecycle of different stages. Your other dog could well pick them up, so do them both together next time.