Hello how may I help you? How much dog food should I typically go through in a week? What kind of dog do you have A chihuahua. Okay I can help you with that. Your dog should be eating about 1/2 to a 1/3 cup a day. So how much would that be per week? or 3 1/2 cups a week. What if he is eating 5 cups a week? Well that depends on his activeness. If he is really active then he will probably be healthy. If he's lazy he will probably end up being ov overweight He's pretty active, so I guess that's okay. Sure