
"interesting what you say about having a wormy pup using Shirleys....I always advise my puppy buyers never to use this only veterinary wormers as have heard of Shirleys being ineffective many times. "
I have always used Shirleys wormer but again, the only time I ever saw anything as a result, was with my first litter - one singleton puppy - and I'd not wormed the bitch pre-mating. With a later singleton puppy, having pre-wormed that mum after my early experience with litter number one, I saw no worms. I'm aware that Shirleys only hits roundworm. And for sure, only used it for baby puppies. Once mine went home, they were wormed with 'normal' worming meds, on my advice at 3 months, and according to what the new owners' vet recommended. Same with those we kept. We rewormed at 3 months, using another wormer, usually either Panacur, or Drontol. Fecal tests suggested/confirmed that they were in fact clear, having used Shirleys when baby puppies.