Actually... wet food being worse for teeth than dry food is a big ol' myth! Wet food is actually less likely to stick to the teeth and encourage the growth of bacteria. Dry food does nothing to clean teeth, especially since most dogs swallow the pieces whole... raw meaty bones and appropriate chews are what keep teeth clean. Plus, wet food has much higher meat content. Puppy food is NOT a must. Fozzie ate all life stages food when he was 9 weeks old, and mostly Raw from then on.

The big concern is that, yes, a poor quality wet food is just as unhealthy as a poor quality dry food. You should definitely give your Aunt a call, or send her an e-mail, with some friendly pointers. I know it's hard, but try to be as gentle as possible with the advice... like saying: "My girls do really well on *insert high quality food*!" Or, you could even send her a puppy basket with good food included. And you could throw in some healthy chewies, like lamb ears & bully sticks, too!