Health & WellnessDog has white worms in poop on Trifexis. What wormer can I buy?
Hello and thank you for your question. First, I Just want to applaud you for taking a prophylactic approach to heartworm and internal parasites by giving trifexis monthly. Great job. Trifexis takes care of and prevents roundworms, hookworms, and whipworms. It does not, however, prevent a dog from getting infested by other internal parasites such as tapeworms or coccidia. Because there are so many different types of medications available over the counter that treat different types of worms in a dogs gastrointestinal tract, I encourage you to take a fecal sample to your local veterinarian to get a definite diagnosis and correct treatment. It would be best to take in a sample of the feces as well as one of the worms that you find for best results. I hope this helps. Have a great day.
Updated on September 24th, 2025