Your puppy should still be on puppy food. Go buy the food the puppy was eating and resume feeding that until your puppy is at least a year old. Puppies and adults have different food requirements. Your puppy is still growing. Yes, the sudden change is probably what caused the problem. Puppies can become dehydrated easily, so take to vet if it doesn't stop. But I wouldn't feed adult food anymore.
__________________ Karen  Kacee  Muffin 1991-2005 Rest in Peace My Little Angel |