When a puppy first gets to his/her new home, it might not eat as much if any for the first 3 days while going through some changes and possibly a little stress from the new environment. Keep food and water down at all time so that you may monitor how much the puppy is eating. On small breeds the first few days we recommend using a high-calorie Dietary supplement, meal replacement. Overnight is the longest period of time in which a small breed puppy is not eating. This can cause the puppy’s sugar levels to lower, which can cause stress and may lead to hypoglycemia. When you wake up and before bed are a must in giving this high-calorie Dietary supplement. We also recommend giving some every 4 hours while the puppy is not eating regular food. Larger breeds may not need the high-calorie Dietary supplement, you can buy this supplement at PuppiesForSale19Breeders