What are the nutritional requirements for dogs?

What exactly do dogs need, and how much of it do they need?  Well that is a broad question and will greatly depend on your dogs health and genetic makeup. For the most part however dogs nutritional requirements from http://www.vcahospitals.com/main/pet-health-information/article/animal-health/nutrition-general-feeding-guidelines-for-dogs/6491 are as follows: 

Crude protein    22%    
Crude fat    8%    
Linoleic acid    1.0%    
Calcium    1%    0.6%    
Phosphorus    0.8%    
Potassium    0.6%    
Sodium        0.3%    
Copper        7.3 mg/kg    
Zinc        120 mg/kg    
Vitamin A    5,000 IU/kg    
Vitamin D    500 IU/kg    
Vitamin E    50 IU/kg    
Thiamine    1.0 mg/kg    
Now as you may or may not be able to tell, plants produce all of these nutrients, there is nothing on here that is exclusively found in meat. Which means that if anyone trys to tell you that dogs need meat, you can show them this blog and say "Ha!" Well maybe not that because that would be rude, but you can gently remind them that these are all a dog is "required" to eat. Now these nutrients do change depending on the dogs genetic makeup, for example if your dog is 1/2 or even 1/4 wolf, they diet may require some meat intake. Or if your don't have kidney problems they have to avoid meat all together and stick to low low protein diets. So there is some exceptions to these general guidelines, but make no mistake dogs and even wolves can and 100% should have plants in there diet, if not have a 100% plant based diet.