Many ppl let there dogs over eat. Doesn't take much for a small dog. IMO there food should be weight and feed 2-3x a day. You can figure out how much they should have with the dog calculator.
http://www.dogfoodadvisor.com/dog-fe...od-calculator/ Just for a guideline but still feel there body. They should have a waist. But hip bones shouldn't be visible but felt. Its easy to love your dog with food. And they always beg and seem Hungry. But for there healthy they shouldn't be overfeed. JMO