One more thing.......................
I have children, and I can tell you that when we go to the pediatrician he has never asked what I feed them. NEVER ONCE. I guess if they were fat, or something related to that he might ask.
So unless ther is a food related problem, allergies, overweight, diabetic, I edon't know why a vet would be worried about diet, unless of course you ask his oppion..............then be prepared to hear it.
Which in this case, it wasn't asked.
(My pediatrician doesn't sell children kibble in his office either!)
When my kids were babies, diet was a large part of what was talked about at the pediatrician's office. When to introduce solid food, how long to go between each introduction, when cow's milk could be added, etc. AND it was not in conjunction with what the grandparents thought!! Things had definitely changed! My pediatrician wanted my firstborn to stay on breastmilk only for 6 months with no introduction of food, and the grandparents thought I was starving her!!
Other than that, I don't think food has been talked about. They would ask if they ate good and a varied diet, but that's about it. I have had them show me the food pyramid.
The pediatric dentist, on the other hand, talks about nutrition EVERY visit.
All of this, of course, is off topic of the thread.
My vet only talks about what my pets eat in regards to whether they're eating well or not, throwing up, etc., and also, if they need to lose a pound or 2, he warns against treats.