[enchilila]

It sounds like you are over-feeding your puppy. Eight pounds at 6 months seems a little heavy to me. I have never fed my dog more than 1/2 cup a day of dry food. She gets a healthy snack each day, like frozen green beans, a few bites of apple without the peel or a few pieces of banana. It has been too hot here to get outside and exercise her a lot so I watch what I feed her. She also has luxating patella in both knees so I try to keep her lean at around 5-1/2 to 6 pounds. Being overweight can cause health problems. The best thing to do would be to have a talk with your vet since he knows your pup. I'm sure others will be along shortly and may be able to help you more.