How is the correct dosage for a medication determined for a pet?

The correct dosage for a medication is determined primarily according to the pet's weight and the specific prescription provided by a veterinarian. This approach ensures that the medication is both effective and safe for the individual animal, as different pets have varying metabolisms and sensitivities to drugs based on their weight.

Weight is a critical factor because it directly influences how the medication is distributed in the body and how the body responds to it. A prescription may also consider the specific condition being treated, which could further modify the dosage.

Using breed or age alone would not take into account individual variations that can significantly affect how a pet metabolizes medication. Additionally, a standard dosage for all pets is not practical because pets can vary widely in size and health status, highlighting the necessity of individualized dosing to ensure therapeutic efficacy while minimizing the risk of side effects or toxicity.