Tapeworm rarely shows up in fecal samples. They're elusive little parasites. Have you seen what looks like rice bits near their butts? If so, that's tapeworm segments. Let the vet know about that.
I would feel a little uncomfortable with a vet who's that adamant that he's always right. I get a vet's frustration that someone will listen to some whackadoodle instead of a medical professional, but vets should also be open to new information and different ways of doing things, willing to discuss pros and cons instead of just shutting down the discussion. You might start asking around to see if there's another vet you want to try.
Bloody mucus can be colitis, caused by just about anything :/. So that's not necessarily a sign of parasites, but since parasites are so common in young kittens they probably have something going on. I hope you can get the poor little kitties all fixed up!
I would feel a little uncomfortable with a vet who's that adamant that he's always right. I get a vet's frustration that someone will listen to some whackadoodle instead of a medical professional, but vets should also be open to new information and different ways of doing things, willing to discuss pros and cons instead of just shutting down the discussion. You might start asking around to see if there's another vet you want to try.
Bloody mucus can be colitis, caused by just about anything :/. So that's not necessarily a sign of parasites, but since parasites are so common in young kittens they probably have something going on. I hope you can get the poor little kitties all fixed up!