14/09/2026
Parasites Are Common, Treatable, and Too Often Ignored
Parasites are extremely common in cats, especially cats who live outdoors. Too often, they go untreated until the cat is already weaker, thinner, sicker, or struggling with problems that could have been prevented. Worms, fleas, mites, and intestinal parasites can drain a cat’s nutrition, cause diarrhea, vomiting, itching, hair loss, poor coat condition, anemia, low energy, and slower healing.
In kittens, older cats, and already vulnerable cats, parasites can become much more than a minor problem. They can push a cat into serious decline. The good news? Parasite treatment is often affordable, effective, and easy to administer. In many cases, it can be given as a pill, liquid, topical treatment, or medication mixed with food, without needing to catch and transport every cat to a veterinary clinic.
Parasite treatment is one part of BCS’s larger focus on preventive medical care. We are working to make simple treatments like parasite control part of our regular community cat model, including sterilization days, mobile clinic work, field support, and public education for carers.
Our goal is not only to respond when cats are already in crisis. It is to help prevent avoidable suffering before small problems become bigger ones.
Common parasites in cats include roundworms, hookworms, tapeworms, fleas, mites, Giardia, and coccidia. Some live in the intestines. Some live on the skin. Some steal nutrients. Some cause digestive problems. Some make cats itchy, uncomfortable, weak, or anemic. Fleas can also lead to tapeworms when cats swallow infected fleas while grooming.
For community cats, this matters because many are already living with daily stress. They may be underfed, repeatedly pregnant, exposed to heat and rain, or recovering from wounds. When parasites are added on top of that, the cat has less strength to fight off other problems.
Treatment depends on the parasite. For many common worms, it may involve a basic deworming medication given once and then repeated on schedule. For fleas and mites, it may involve a topical medication that protects the cat and helps break the cycle of reinfection.
That is why this work matters. Not every animal welfare problem requires a major surgery or an expensive hospital stay. Many cats suffer because basic care never reaches them in time.
As BCS expands our medical focus, parasite control will be part of a broader prevention model for Bangkok’s cats: sterilization, parasite treatment, basic wound care, early intervention, and practical support for the people already caring for cats in their communities.
When common problems are treated early, cats suffer less.