Another so called Myth - By-Products are poor quality ingredients

By-Products are poor quality ingredients.
Myth?
Purina would like you to believe it is. 
Okay, lets take a look.
**************
My comments will be in red
Purina in Black
Linked information in Blue

•  A by-product is any ingredient that is produced
 or left over when some other product or ingredient is made. Purina Pro Club

• An incidental or secondary product made in the manufacture or synthesis of something else. Oxford Dictionary

•  Something that is produced during the production or destruction of something else. Merriam Webster

•  Output other than the principal product(s) of an industrial process, such as sawdust or woodchips generated in processing lumber. Unlike joint-products, byproducts have low value in comparison with the principal product(s) and may be discarded or sold either in their original state, or after further processing. Business Dictionary 

*By-Products have low value in comparison with the principal product.
Of course it does - you are starting off with something like an Apple for example. 
The fruit part is used for a pie - the skin and core are the By Product. 
Except we are not talking about apples - we are talking about animal carcases.

You start off with lets say a Cow
Hi Mr Moo
  

See the Grey areas? The ones marked Waste. 
That is what is left after all the human consumable food has been removed. 
Sorry, that and all of the innards, skeleton and some organs.



By-products (for example, chicken by-products or beef by-products): clean non-rendered "parts", other than meat, derived from slaughtered mammals. It includes, but is not limited to lungs, spleen, kidneys, brain, blood, bone, fatty tissue and stomachs and intestines freed of their contents. This is a cheap way for pet food companies to keep the protein levels "high" (although not high quality) while keeping food production costs low.  Pet MD

• Broths and gelatin are examples of meat by- products in human foods.

That is true, but they are not generally used in pet foods are they?
No.. That is interesting that you would mention those two items. 
Are they a staple in your pet foods?
What? No? Ah.. so they just sound better then Boiled Bones and Boiled Skin. 
One more thing, I don't think 'meat by-products' are used in many human foods. 
That is an un-named meat source. They may use Beef By-Products, or Chicken By-Products..but 'meat' well that could be anything from a cow to a cat. 

• By-products in pet foods that meet Association of American Feed Control Officials (AAFCO) guidelines come from clean animal parts other than meat, such as liver, kidneys and other organs.

Such as - but why would you not just call it Beef Liver? 
Cuz you can't. 
Cuz all of these items are not sold singularly to become by-products. They are mixed together right?
Beef By-Product is all the non meats parts of a cow allowed - mixed together. 
Meat By-Products are all non meat items tangled together in a big sloppy mess.  

I wish people didn't dance around calling crap something other than crap.

•  Purina purchases all by-products from USDA- inspected plants. They must meet stringent criteria for nutrient content, production and quality assurance.

Where else would you buy these things from? The back of a van?
Of course it starts off as an inspected animal-  that seems to be the norm. 
Does food unfit for human consumption still get inspected to meet stringent criteria for nutrient content, production and quality assurance?
What happens when you guys get it?
Forgive me for not feeling a warm fuzzy feeling about your company.

• Muscle meat is deficient in many nutrients, including calcium, other minerals and vitamins. Many of these missing nutrients are abundant in meat by-products or poultry by-products.

How do the other companies manage to find this missing nutrients ?

• By-products are also an excellent source of protein and amino acids.

So are Non By-Products.

• For example, poultry by-product meal contains 60% to 70% protein and can be highly digestible.

Can be? Well if you can't digest powder then you might be in trouble. 
I wonder how much is in Chicken Meal?
Does the quality of the meat matter? I think it may...

Think about a cat in the wild...it is not going to  look at a mouse and think a powdered version would be better..or even just as good.

I really wish animals could talk - then we could let them tell off the companies that are putting profit before quality. 
They can tell the companies that no meal product can ever be better then the initial raw product. 
Taking a bunch of crap and grinding it together - then rendering it only provides you with a high protein pot of powdered crap.
Just saying...