When I was training my GSP we could NOT use California quail for training. We either used bobwhite quail or pigeons. Pigeons when training dog for steady to point, flush and wing. The bobwhite were used at trials for shooting and retieving. The pigeons were put in quick release traps. When the dog went on point, the pigeon would be released and the dog made to be steady to wing when the bird was released. It would progress to steady to shot after that was mastered. You will need a 20 or 30' check cord/leash for that type of training.
Ive got a local source for quail although I’m not sure which species exactly. Were CA quail too hard to keep alive? Ive heard chukar is the most hardy bird to raise for training. Ive got a check cord and plan for it to get some use.
My plan for Friday morning training - pickup a few quail Wednesday and I’ll keep them in a large dog crate with water, bedding and some food.