We recommend all pets bring in stool samples for annual fecal testing. This tests for Hookworms, Roundworms, Whipworms, Tapeworms, Giardia & Coccidia. If your pet is on a monthly heartworm preventative this does prevent general worms (roundworms, hookworms), but does not prevent Giardia & Coccidia. We would need a small sample the size of a hershey's kiss. ($35)
If you are unsure please bring in a sample and discuss this with your Veterinarian.