Shelter Health

Common Parasite Treatments

Animals often enter the shelter already infested with one or more parasites. While no single product treats all parasites, many effective products are available to treat specific parasites found in shelter animals.

The table below lists some recommended products. Your shelter veterinarian can help you develop a treatment protocol with products that are effective against the parasites encountered in your shelter.


Purpose/Parasite Treated

Dosing Schedule


Dewormer: hookworms and roundworms

Animals can be infested even though the parasites are not visible in stool samples. The adult worms can look like white or cream-colored thin string or "angel hair pasta."

For canines and felines:

1 to12 weeks old: given every 2 weeks until 12 weeks old

3-6 months old: dose repeated in 2 weeks, then given every 4 weeks until 6 months old

> 6 months old: dose repeated once in 2 weeks


Dewormer: hookworms, roundworms, and whipworms

Animals with whipworms: Give once a day for 3 days; 3 day treatment repeated in 3 weeks and again in 3 months

Marquis Paste

Dewormer: Coccidia

Animals with Coccidia: One time treatment


Dewormer: tapeworms*

Dogs and cats over 6 weeks old diagnosed with tapeworms: One time treatment, but repeated if needed


Flea control**

Animals over 5 weeks of age: One time treatment, but can be repeated daily if needed

*The common tapeworm is often found on an animal's rear end or caught in their fur. These worms are white or cream-colored and only about ┬╝ of an inch long. They can move on their own like an inch-worm. Once the worms have dried, they look like grains of rice or sesame seeds.

**Tapeworms are spread by fleas. Animals with tapeworms should be treated for fleas as well as dewormed.