I'm forgetting some of the details now but yes, it was the yorkie 28 that they "dropped".... they replaced it with just yorkie and that formula has the by product stuff in it and a lower protein %... Other RC customers were using a different RC formula for their yorkies I think because of the volume they were buying, more dogs, more food,.... OR.... they had yorkies that were fine with eating larger kibble???? Their formulas, different RC offerings, either didn't change or didn't change as dramatically so they are going to continue using it, no reason not to... It doesn't make RC a bad company, or their feed a bad food, just a company that doesn't see transparency and openness with their customers as a value. It's no different than any other large company in that way. I certainly wouldn't call them a premium company, they are just another Purina, no better, no worse. I can't recall who wrote it, but it was well said... "With a change like this(changing the RC yorkie ingredients) you may as well buy one of the better Purina products and pay half the price of the RC yorkie product." that wasn't the quote, exactly, just something like that and a fabulous point.
If you're paying for the RC yorkie formula, and have any doubts about the ingredients what so ever, you should find a better feed that is similarly priced somewhere else. You and your dog will get better value, ingredients, at a different company or in a different formula.
If it was chicken organs, I'd be all over that as a good change, but by product, that's an open menu to whatever is cheapest at the time that they buy the ingredient. LOL It could be cast iron, fiberglass, rubber, leather... LOL (a joke from within this thread)
I was just about to write that there are hundreds of options for us,,,, I just noticed you're in Mexico! I don't know what options you have.