Can you feed them in separate areas, maybe separated by a baby gate? Also, don't leave the food down all the time(after pup is > 3months old). Give them 20 minutes or so, then pick it back up.The puppy needs to be fed 3 times a day but not adult food. A puppy should get 1/2 to 1 oz of food for every pound of dog daily, divided into 3 meals. More and he will be overweight. Less and he may be malnourished and or hyooglycemic. You need to measure and keep track of intake. Having access to the poms food needs to be stopped. Good luck!