How much balancer should I feed?

I'm curious, as a concerned pet owner, about the proper amount of balancer to feed my furry friend. Can you guide me on determining the ideal serving size? Is it based on the pet's weight, age, or activity level? Are there any specific guidelines I should follow to ensure a balanced and nutritious diet? I want to ensure my pet is getting all the necessary nutrients while avoiding overfeeding. Could you elaborate on the best practices for administering balancer?