Until I found the dead worm I would have been none the wiser she was infected.. She has always been full of energy and a happy dog - people often ask where the off switch is, lol. She has had a nice, clean, shiny coat and until yesterday I had not spotted any worms in any of her poops. When I bought her I was told that she had been wormed and vaccinated. I had proof of the vacination but not of the wormer. I bought a "generic" wormer from the petstore and gave her the dose as prescribed, then this month I gave her an all in one Interceptor tablet (which I will now continue to use). It appears that the interceptor did its job as the worm was dead. The vet said it would not be a surprise if the wormer provided by the pet store was not a complete wormer. I was advised by the vet to worm her every month, which I will continue to do.
She has been fairly lethargic today, which is what is concerning me.... Thankfully her vet is also a 24 hr animal hospital.
Thanks for your reply, DTDO.