Good point! And information I did not know. Only 30 eggs? I had no idea.
BTW, I just went to your web page. What an amazing and generous service you provide! ❤
Facetious. No, not 30. But the changes between, say, 1800 and 1970 were substantial, and the changes between 1970 and today were greater still.
A modern Brahma of good quality, with modern feed and management, likely lays as many eggs each year as a leghorn at the turn of last century. Leghorns themselves lay around 40% more than they used to, 100 years back, and our production hybrids lay bigger eggs, sooner, and more frequently than any breed you might find in a book of chickens through at least the middle of the 1900s.
Modern meat birds are bigger, faster tot he table, and far more tender - and at greater feed efficiency.
Of course, 100-150 years ago, the chickens raised in quantity were fed a pretty basic diet determined by experience, not understanding of the kewy nutritional components, and the typical small farmer flock likely wasn't "fed" at all, being expected to scavenge feed missed by all the other animals on the property - hog, cow, horse, or dog, plus trimmings and leftovers from the garden plot, dropped seed in the fields, and whatever insects it could capture.
The modern bird has it FAR better - and needs that human hand providing modern feeds if its going to perform to modern expectations.