While I can agree that home grown food can be healthier for our pets, there are many different points to consider before feeding our pets raw meat.
First, to get my emotional opinion out, I love my quail. I keep my quail in the best and happiest ways I can manage. Even those I raise for slaughter are given occasional treats such as mealworms, black soldier fly larva, boiled eggs, and fresh veggies.
Now for the logical side. It would take about 5 or 6 button quail to feed a 5 pound chihuahua a single meal (and dogs should be fed a minimum of twice daily.) As for a raw meat diet : Yes, dogs are carnivorous, but they still need plant protein and vitamins. Dogs do eat some veggies, and also ingest plant matter that prey items ate and still have in their stomachs and intestines.
I have used quail chicks as feeders for reptiles before. Many arboreal boas and pythons eat birds as a main part of their diet. Feeding quail chicks is no worse than feeding baby mice to snakes.
The main issue, as mentioned before, would be cross contamination of pathogens. Especially salmonella! In order to insure clean, pathogen free meat, you would have to keep the quail in near laboratory conditions. This means keeping them on wire and cleaning and sterilizing their food and water containers several times a day.Their food and water containers would also have to be maintained in a way that prevents them from soiling them with droppings.
But, yes,raw meat offers more usable proteins than cooked meat (cooking breaks down proteins.) However,cooked meat is much safer to use.
If still interested in home grown meat, Coturnix quail would be a much more feasible alternative.