Welcome to the thread Sebisebster!
I enjoyed your post very much.
I've often wondered why L.A. had these pigeon farms.
In addition to the USC archive photos, I have seen numerous postcards of the pigeon farms.
I just thought they were shitty (literally) tourist attractions.
Gsjansen mentioned in his post they supplied squab to local restaurants.
It didn't occur to me that squab was pigeon.
I found this menu I had posted earlier, and sure enough squab is offered at the Hotel Westminster.
NYPL
If you look closely, the menu is dated May 21, 1901.