Color me confused

Myth?

Some consumers believe that food coloring and dyes in pet food cause allergic reactions and gastrointestinal upset in pets. 
-Purina


You know what, lets just skip the bullshit here. 
There is absolutely no need for any food colorings or dyes in pet food  NO NEED

You can try and prove that Dog A and Dog C did not have an allergic reaction to your food. 
You can blame something else for gastrointestinal upset in Cats.
You can call yourself a Fire eating Duck with Machete wings for all I care.
-I may be in a Halloween Monster type of mindset.

You could possibly be idiots if you actually believe a Dog looks at the food and thinks -
 Hmm, I really wish this was red. 
Golly, the green stuff tastes so good.
This brown food is missing something.. I know! Artificial colors!
Human, go buy me some Dog Chow at once!
Blue 2, Yellow 5, Red 40
Dog Chow

• The quality, digestibility and nutrition of the product is unaffected by the use of artificial coloring.

Sometimes things can't get worse then crap.

• Some colors are derived from natural sources, such as beet powder and turmeric.

Interesting - do you use beet powder or turmeric ?
Beet powder is red right? - You use Red 40- that is not Beet powder is it?
Turmeric can make a yellow color - You use Yellow 5 - that is not Turmeric is it?
NO so please tell me your point?

• Small amounts of dyes are used to produce the color.

How about none. 
You can create food without food colorings. You would have to use actual foods for it.

• Food allergies are most commonly caused by proteins. Food colorants are not proteins.

 Actually these are chemicals. 
So I am guessing it would be a chemical allergy?
I do not know.
Since eat dog or cat is different - different breeding, different environment - it is very hard to pin point what the allergens are. 
Goodie for you!

I love this last little notes on your page

Remember
Purina has a long history of producing high-quality, highly nutritious pet foods that are rigorously tested.
-You have been around for a long time, stating that you have a long history of producing high-quality foods needs to be backed up by people that do not benefit by that statement. 
Highly nutritious? 
You thought this was nutritious
While a pet food may contain different colors, the nutrition, quality, safety and palatability of the diet are the standards by which it is measured.
To me that means..yeah there is food coloring but don't worry... we just ignore it.