Cat's worms returned after treatment. Why is she peeing blood?

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.

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.

What you're seeing is most likely tapeworms. Tapeworms are intestinal parasites of the cat and dog. They belong to a different family than hookworms and roundworms, which are the other common intestinal parasites of dogs and cats. Fleas are the intermediate host for tapeworms. In other words, the tapeworm is unable to complete its life cycle without the presence of fleas in the environment. Regardless of whether the owner may have seen fleas, the cat must have ingested a flea in order to have tapeworms. Consequently, tapeworms are more common in environments that are heavily infested with fleas. Most commonly, owners recognize that the cat has tapeworms and bring this to the attention of the veterinarian. When segments of the tapeworm break off and pass into the cat's stool, they can be seen crawling on the surface of the feces. These proglottid segments look like grains of cooked white rice or cucumber seeds. Less commonly, segments are seen moving around the cat's anus. A variety of products are available to treat tapeworms in cats but they are not all equally effective. For the best advice on the type of de-worming preparation most suitable for your cat, you should seek the help of your veterinarian. The most effective worming products are only available by prescription from a licensed veterinarian. Flea control, both environmental and on the cat is necessary to help prevent this from recurring.

It is normal to see some blood and diarrhea when giving worming treatment. These symptoms usually last for only two to three days. Because Gypsy is so young, it will take more than one treatment to kill all the worms. The treatment you gave now will kill the adults already in her system, and the next treatment will kill the ones who have yet to become adults. If the blood in the diarrhea persists longer than 3 days, I would take her into your vet, as there may be another cause for these symptoms.

That looks like a roundworm. You need to deworm a cat every two weeks when they have worms due to the life cycle of the worm. The deworming treatment will not kill eggs. So the first treatment kills the adult worms present while the second one kills the worms that had not yet hatched at the time of the first deworming. Give Max a deworming treatment now, another in two weeks, and then another two weeks after that to be safe.

From the picture you provided, it looks like Lucy could have roundworms. I recommend giving her either Panacur or Drontal. Both kill roundworms, hookworms, and whipworms, and Drontal will also kill tapeworms. You can get both from your vet's office. As with last time, you should get her one deworming treatment now and then another two weeks later. At that, in order to keep the worms away, she will need to be dewormed every three months. I hope this helps!

These do indeed look like tapeworm segments, so BV will definitely need to be treated again. Normally, to make sure that all life stages of the tapeworms are killed, the initial deworming dose needs to be repeated in 14 days - so if this wasn't done the last time she was treated, this could by why the problem has recurred. She may also simply have become re-infected, either from fleas or from eating dead rodents or other animals if she hunts outdoors. I would recommend calling your vet to let them know that you are seeing tapeworm segments again - they may be able to have you come and pick up another dose of dewormer for her, rather than requiring another exam since she was just seen for this problem two months ago.