Layena runs about $13-14 for 50# bag here in WA. Personally, I would do some checking around to see what other stores in the area are charging for it. Then tell your feed store that if they can't carry it for you without charging all that extra $$, you'll just take all your business to the stores who will.
In this day when there are so many companies doing everything they can to get your business, it's ridiculous for companies to be doing that. I don't care if they do have to "special order" it, my guess is that is still way too much for what they're getting it for.
I'm a member of a Co-Op and they do special orders without marking it up above what they do anything else. Moreover, I doubt very much that you would be the ONLY one buying the product from them if there were to carry it.
Now to the question about Layena, you have to keep in mind that Layena has been specifically formulated and designed by animal feed scientists to have just the right amount of ALL ingredients. You can't just look at things like "Protein Percentage" as there are other things to be considered such as amino acids and such.
Also, too much protein is not a good thing. This is especially true with developing pullets and cockerels.
Finally, as for the orangish-yolks, the folks above have it spot on. Feed them some greens if they aren't able to free range and get it on their own.
God Bless,