Right, but the OP blames it on "concentration", whereas you're just describing factors that make a commodity volatile. The global crude market isn't anywhere near as concentrated as the US egg market, but it's also quite volatile.
Also, many of the "independent" farms in reality run with a single-"customer" contracts and the margins squeezed to the max in a way they even need to borrow huge amounts of money just to stay afloat and don't breach their contracts with huge conglomerates like Tyson. In practical terms the supply side for the quarters is decided by a couple managers who work for these big food companies which have their own "tough" contracts with retailers like Walmart, Target, etc. So if the manager happens to be a dipshit or making a bad move the consequences of that are national. And I'm not even talking about shoving MILLIONS of animals packed in a couple acres. If one coughs..