I've been home cooking for over 50 years without consulting a "nutritionist", and have never had any problem with adverse or allergy reaction.
I think it's wonderful if you find a commercial food that works for your dog, but there are dogs that do eat a commercial brand end up with a slew of health problems, so I'm just giving information for an alternative choice. Since we are putting some sites out to read, here are a couple I find very interesting as well.
What’s Really in Pet Food WHO REGULATES THE PET FOOD INDUSTRY