Possibly overfeeding, our Labrador was a pain eating a lot of the time and the vet had her down to 2 meals at 6 months. We were giving her the amount the food recommended but the vet said she was overweight so are giving her the vet recommended amount in calories. We were concerned she would not have enough, 120g of her food twice a day plus the odd low calorie treat however since doing this she eats her food straight away now. Prior to that when I needed her to finish breakfast before doggy day care etc she was a pain but no such issues now so she probably was overfed.