Wow, you have quite the flock! And you keep quail too? I keep Bobwhites as well! I used to have 3 large aviaries full of Bobs. I was involved for a short period of time with raising birds for release on public lands. I had so many quail, you needed to know trigonometry to count them all!
But I got out of that knowing that most of these birds would never survive the wilds. I did enjoy the hatching though. LOVED the hatching part of it! The incubators never cooled off for a few years.
I have been keeping Bobs for about 10 years and since then have been letting them all die off from old age. I have many that are 7 years old yet. Can't believe they are still alive. LOL Some have arthritis pretty badly, but still get around. I have my health tricks to keep them walking.
I am at 7,000 feet up in the mountains. Southern tip of the Rocky Mountains. Much of New Mexico is in the mountains. The eastern portion of NM is part of the plains states and the southern portion is deserty. Not like Arizona with all the cactus and all. But dry and sandy like. Hot too. We don't see heat up here in the summer. Quite cool. We can freeze to death in the winter. LOL But what with the drought we have going, no snow, the cold has retreated and it was a very mild winter.
Hope your birds come around from the foxes lurking! They can be quite timid for some time after trauma. My girls saw a hawk take a large dove right outside their run last summer and they still don't like hanging out in the run very long. LOL