Here's why:
* Underlying Conditions: Your dog's sluggishness and illness could be caused by something unrelated to worms. A veterinarian can diagnose the underlying issue and prescribe the appropriate treatment.
* Drug Interactions: Dewormers can interact with other medications or treatments, potentially causing harmful side effects.
* Dosage: Incorrect dosage of dewormers can be dangerous for your dog.
Please take your dog to a veterinarian immediately for a proper diagnosis and treatment plan.