Avoid a Real Problem: Pet Obesity

It is not an easy answer and no one specific guide that you can follow.  There are MANY factors that would affect the quantity of food that is required such as age, size, breed, activity level, body condition and digestive system/ function, etc.

So even the same breed of dog, the amount should be fed can be very different.  Therefore, please do not just bindly follow the standard guideline on feeding instruction.

Be proactive, monitor your pet's body condition.  If you feed too much or too little, your pet would be overweight or underweight.  The key is to monitor and adjust the quantity required.  But if you pets' appetite change suddenly, it could be an indication of health issue, discuss it with your vet.