There are a range of problems with commercial dog food.
The truth about most commercial dog food is that they are loaded with additives and harmful chemicals that harm your dog over time.
Many dogs are suffering from many elements that can be avoided when the right food is fed to them.
The Pet Food Industry is a Multi-Billion Dollar Industry Driven By Greed
It's designed to glean profits at our dogs expense.
What else goes into dog food:
dead zoo animals
euthanized pets from the pound (with poisons still in them)
dead, dying, diseased, and cancerous cattle from feed lots
skin, hide, feathers
anything else they can't turn into human food
So I suggest you do the right thing by your dog and buy raw meat and bones from butchers or markets. Because if you give a dog a choice between a bowl of dried dog food or a bowl of raw meat. The dog will go the raw meat every time because that is their natural instinct. And that is what their stomach is designed to digest.