I think this is all very obvious to you all, but it appears to me that the reason chicken feed is much more expensive is because it has a higher demand.
In the world of hay day, 12-18 chicken feed is required every 20 minutes, and since 3 chicken feed is produced every 5 minutes, you will not have enough time to make enough feed if you have more than 12 chickens. But that is assuming you are collecting the eggs with 100% efficiency...
Let's face it, no one likes the feeling of wasting resources and when you have fat chickens waiting to be harvested for eggs, it's hard not to... Leading to my next point...
The large supply of eggs is mainly due to the disproportion between supply and demand of eggs; Most people will not be using eggs as much as they will be producing them. In the lower levels I often had to refrain myself from producing too many eggs, but I'm not sure about 20+. The only places for me to use eggs are pies, cornbread, cookies, bacon and eggs, and pancakes. You most often will not be producing these in batch, but rather to keep a supply of 1-2 of them as required by the truck orders. Further, it's not too often that you might get these items as an order and so people have no real incentive to produce these items other than to just sell them off or for stockpiling if you have a large warehouse.
Thus eggs are in a large abundance.
But most importantly... Eggs are usually one of the things that cloggs up your warehouse... And the easiest solution is to sell them for cheap so that others would buy them quickly. However, you have many people doing this ( due to this reason, but also because they realize that harvesting eggs could easily be an easy couple of bucks of profit! From the third paragraph) and thus eggs clogg up the newspaper. Newbies that may look at the newspaper see lots of eggs being sold for a low price and may
1. Decide that eggs are extremely worthless and may not buy them at all (leading to the reduction of prices of eggs further)
2. Realize that eggs can be used as quick money by harvesting and selling them in their shop
3. Realise that in order for their eggs to sell, they have to advertise theirs at a competitive price.
Whoops, what seemed to be a quite basic attempt at an explanation became a ramble...
Edit: add in the fact that the games likes to give you notifications that your eggs are ready to be collected! That's quite annoying. Lol
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