Dog ate chocolate?

ask a vet

Still has roundworms.

Species: Cat
Breed: DSH
Age: 1-2 years
My 2-year-old cat, Oliver, has been having a problem with roundworms. He was born outside and I adopted him from a shelter. Now he is strictly an indoor only cat, and I keep his litter box and my home very clean.

A few months after I adopted him in January 2010, he vomited out 3 roundworms. I immediately got him a Drontal treatment (two pills within three weeks) and then brought in a stool sample and it tested negative for eggs/parasites. 3-4 months later, the same thing happened; Oliver vomited out worms, he got dewormed, and then tested negative. I cleaned his litter box with bleach and threw away all his toys he carried around in his mouth.

A week ago, Oliver vomited out roundworms again! This is the third time that this has happened. I don't understand why he keeps vomiting out worms after his stool tests negative. Could you tell me what's going on with poor Oliver? I'm not sure if I should give him Revolution for the rest of his life or keep deworming him every few months.


Online vet, Dr. Marie

Dr. Marie replied:

A cat can still have a negative stool sample even though they have parasites. This is because some parasites like roundworms can go through a stage where they don't lay eggs.

While Drontal is a good dewormer, if this were my case I would likely be using a different dewormer (such as milbemax) every 2 weeks for about 8 treatments, and then every 3 months.

Revolution is ok for roundworms but not the greatest.


---This question was asked in our Ask A Vet For Free section.---


Do you have a pet website? Interested in learning more about SEO for Wix?


Check out our dog age calculator and cat age calculator.

Want to receive pet coupons, vet advice and info on new pet products in your inbox?

* indicates required

We'll only send you great stuff, never spam. Unsubscribe any time.

Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

Search for similar questions:

ask a vet

Popular questions...

Trouble with back legs. I have a 11 yr old, inside only cat, that is a little over weight approx. 15lbs.... (47464 views)

Dog won't walk. my dog has almost stoped walkin and jus crawls around,unless it like to get food of... (21636 views)

Parvo protection. Hi Dr, My Golden is 7 weeks now. I will be taking him home next week after he's... (77480 views)

Repeat of parvo? my 3 puppies got parvo last week (6/29/2010)they were only 3 months old and they all... (27269 views)

Reduce allergies to cats. I'm allergic to cats but I would love to have one. I've recently heard that there is... (10787 views)

Is ginger safe for dogs? I make dog biscuits to sell at craft shows and with xmas coming up sooner than we... (47654 views)

Stinky skin in pug. My pug is losing his hair and the skin is turning black around his neck. It started... (21790 views)

Epsom salt vs table salt. hi my cat keeps limping on his leg i have checked it and it isnt his leg thats the... (21233 views)

Licking at lump on leg. Hi! My name is Sachiyo Ono and I have a question about my pet. I am only 14 so I... (31809 views)

Sick 4 week old puppies. i have 5 chihuahua puppies of 4 weeks, and last night one of the pup's started... (23867 views)

See all questions...

Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.