I have been breeding birds for a very long time. Not chickens actual different types of birds. My grandmah had been grooming me for it for a long time as they were "pets" and the chickens were not. lol. Her reasoning for needing help with the numerous birds and huge cages.
I actually do have a question, It's about the sour crop, in the previous post.
When I was growing up I noticed when we cleaned out the gizzards of the chickens that they had a lot of pebbles and small rocks within. Just recently when I culled my first, I noticed the same, She had pebbles and fish tank river rock (from one of my cleaned out tank areas I assume)
When some of our birds came down with sour crop we made a trip to the river in the Old Jeep. Spend a day crawfish hunting, swiming, coconut finding and all (good memories there) We always came back with two buckens full. One filled with river pebbles from the shore and another from wherever she told me to get it
IN the river.

There
was a difference in size. But it wasn't by much IMHO. (from what I remember)
Either way it cured the sour crop problem for the birds and we would find the wild chickens in the buckets if we left them open. Here in florida, The "grit" they sell for Birds is SAND. :/ Most definitely NOT what I was used to. But I rarely run into the sour crop problem with the birds using the sand. I guess, for finches,parakeets and love birds, sand is the equivalent of tiny rocks?
I know I've made this really long, but confession time, I have not bothered to buy my chickens grit or oyster shells.(both suggested Ill admit) The yard I live in is pebbled and I got Sand everywhere.
Do the OTs give grit to their flocks? How often do you notice and cull for the sour crop in your flocks and how can I avoid it?? (if possible??)