Why is my cat still throwing up worms and mucus after deworming?

Poor kitty. Typically most pets require a second deworming 2 weeks after the 1st to treat for re-emergence of worms because of their life cycle, so yes it is appropriate to deworm Molly at this time. Pyrantel palmoate or Fenbendazole are typicallly used. This should clear things up for good, as long as she doesn't get re-infected from exposure to the outside. Keeping her on a monthly flea preventative like Revolution can also help prevent re-infection because it contains an intestinal dewormer in it as well.

It could be they had worms previously and you didn't know it. It sometimes can take until there is a heavy infestation of worms for you to see them in vomit or feces. Typically only eggs are passed in the feces, and those eggs can be seen with a microscope, not the naked eye. You have to repeat the deworming treatment to kill all the worms. The first one treats the adults already present, while the second in two weeks will kill the ones that had not yet hatched at the time of the first treatment. Hopefully you will stop seeing dead worms in the next couple of days, but it means the treatment is working. Best of luck.

Due to the lifecycle of tapeworms, more than one treatment is needed to kill all the worms. At least two treatments need to be given two weeks apart. The first kills the adult present, while the second kills the adults that had not yet hatched at the time of the first treatment. You need to take your kittens back into the vet.

Submit the worm and a stool sample to your veterinarian to identify the specific parasite. You may need to repeat the deworming and then use a monthly preventative. The dewormer likely did not clear all the parasites, since it only affects the parasites at a certain stage in its lifecycle.

Deworming doesn't directly stop vomiting. IF the vomiting is indeed caused by the intestinal worms, I would expect vomiting to stop within a week or so of deworming, but it could be longer if the parasite load was causing a lot of irritation. I would still recommend a recheck if still vomiting after 5-7 days.

No need to apologize for posting again, we are here to help :-) Even though Misty has been dewormed once, it will take more than one deworming treatment to kill all the worms. The first deworming treatment kills all the adult worms, but it doesn't kill the eggs. That's why you need to give a second deworming treatment two weeks after the first. This second treatment will kill the worms that had not yet hatched at the time of the first treatment. I would give her another deworming treatment in a week, and then if that still doesn't clear up the diarrhea, have her seen by a vet. You are correct her kittens can get worms from her, and they should be dewormed as well. I hope this helps!

Sometimes the worms die and just come out like mucus in the stool, not full worms. If you gave the proper dose I’m sure it was effective. You can repeat the deworming in two to three weeks to be sure and follow the directions on the package. Thanks for using Petco Pet Education Center, formerly Petcoach to help you care for your cat.