E., for the immunizations, talk to your pediatrician - I have done all the standard childhood ones, except chicken pox - he got that before the vaccine. LOL But, I find that now he is a teen that I am waiting on ones like HPV, HepC and meningitis until I learn more - but with ongoing conversations with our doctor. There are some standard illnesses that are easily preventable, and have been almost eradicated, because of vaccines - and that have been administered for years to generations of children.
As for dogs, some breeds are considered more aggressive than others - but with pets, as with children, you get what you put into them. If you train a dog to be aggressive, then that will be all it knows. I have neighbors with pit bulls and they are the biggest, goofiest dogs that I have ever met - they are friendly and funny. I have another neighbor with a little shitzu that is one of meanest little dogs I have every encountered. So both with personalities contrary to what is considered normal for their breeds.
Dog foods do have to be manufactured to certain minimum standards - some are better than others. I chose my dog's food brand after learning about ingredients and nutritional requirements. Just like I chose food for my son and me.
I believe that with research and knowledge, and consultation with learned professionals, we can make informed choices for our families.
But know that, as with all things, where you get your knowledge from is just as important as learning. There are many urban myths and frauds out there that revel in the sensational and use scare tactics to win people over or to sell a product. Always, learn as much as you can before making a decision for your family.