Your choice of puppy food should remain consistent in order to avoid creating digestion and other health problems for your new companion.
Things to consider: A puppy's sensitive digestive system, behaviors while eating, and training opportunities.
Food Consistency - Puppy food center selections at the store for new puppies can sometimes be overwhelming. You may feel inclined to try out all the different kinds you see to discover what she likes best. Don't do it. You can seriously upset her digestion and dissuade her from eating any dog food you feed her. Instead, when first introducing your puppy to a new food, do not just switch to the new food all at once, but gradually switch over from the one she was already on when you first got her.
No Growling - To teach your puppy not to growl or become aggressive whenever someone approaches his food dishes and bowls, get in the practice of, while he's in the middle of eating, adding a little bit of food or dog treats from the store for new puppies' puppy food center in the bowl. That way, he will get conditioned that whenever someone approaches his dishes and bowls, rather than posing a threat, it is actually for a positive reason.
Training Time - Feeding time is always a great training opportunity. Rather than just placing the food from the store for new puppies down on the floor and letting the pup dig in, have her sit first. This will not only help reinforce the "sit" command, but it will teach her that nothing in her life comes without permission from you. If she does not yet know how to sit on command, no worries. You can use this time to train her easily. She will be so excited to eat by the smell of her food that all you will have to do is raise the food bowl overhead and back, and she will sit back on her haunches to follow it with her gaze. Then, when she obeys, you can praise her and place down her bowl of food from the puppy food center.
