Why Is My Cat Losing Weight? Selarid for Cats Explained

Quick answer

If your cat is losing weight, parasites such as fleas, ear mites, or heartworms could be the cause. Selarid for Cats (selamectin) is a topical solution that treats these infestations, which may help your cat return to a healthy weight.

Diagnosis: Is Selarid the right step for your cat's weight loss?

• Symptom: Your cat is losing weight without a change in diet or activity. You may also notice scratching, head shaking, or dark debris in the ears.
• Likely cause: Flea infestation, ear mites, or early-stage heartworm disease. These parasites drain nutrients and energy, leading to gradual weight loss. If you see fleas or ear mite signs, parasites are a strong suspect.
• Corrective action: Apply Selarid for Cats topically once a month. Choose the correct dosage based on your cat's weight (available size options). Continue monthly to prevent reinfestation. Monitor your cat's weight over 4–8 weeks. Improvement suggests parasites were the cause.
• Stop or choose another option: If weight loss continues after two months of Selarid use, or if your cat also shows vomiting, diarrhea, increased thirst, or lethargy, stop self-treatment and consult a veterinarian. These signs point to medical conditions that Selarid cannot address. Persistent weight loss despite parasite control requires a vet exam.

Product facts

• Selarid for Cats: Selarid kills adult fleas and prevents flea eggs from hatching for one month, and is indicated for prevention of heartworm disease and treatment of ear mite infestations. By eliminating these parasites, Selarid removes a common hidden cause of weight loss, allowing your cat to conserve energy and regain a healthy appetite.