Not too sure I buy into that surrogator. Predators, disease and natural selection take a lot of birds out. Also, when these birds are released, they no longer have those walls to protect them.
On average, if you buy 5 week old birds that have already been in a flight pen, 2 of 5 will not survive the first night. That's because they've never been exposed to "real" elements. Those that survive the first night have a good chance of making it on the predator aspect anyway.
If you want to get and keep a quail population, more of it has to do with weather and land management than anything. I.E., extremely wet springs are hard on the broods.
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