[YorkieRose]

If it is tape...and they look like small grains of rice alive...and brown bits of tabacco on the anal area once dried...then I would not be as concerned as other worms.
Tapes do the least damage to adults and puppies...of course, you do not want them, but compared to hooks...and I do not ever recall a vet telling me they come out alive in a stool...they are very dangerous to pups and adults. Usually, the stool is a dark red even black with hooks..

IF you take a stool and the vet sees no worms, then it is tapes...they tend to crawl away and die long before most breeders see them, very tiny and will never find once they move off the stool..and that is why people are shocked to find out a dog has them after a negative sample.
Your vet will know how to treat the problem...