The therapeutic dose of amoxicillin for cats typically ranges from 5 to 10 mg per pound of body weight, given orally every 12 to 24 hours. It is important to consult with a veterinarian to determine the appropriate dosage for your specific cat, as it may vary depending on the condition being treated and the cat's overall health. Additionally, the duration of treatment will also be determined by the veterinarian based on the specific condition being treated.