Enchanted, this species of rattlesnake is NOT usual at all for Fair Oaks (no. CA) so unless its GPS failed or its been desert hot up there and they somehow found their way into your coops/yards, you would need to do a visual ID on it. Sidewinders have a horned head. Not huge (you can see lots of pics on Google) but distinct horn like protrustions.
IF it happens to be a sidewinder, best to call out a professional reptile person, usually found under *exotics*. Or, contact the closest zoo and ask for recommendations for handling dangerous snakes. But first ID the species.
As to rattlesnakes, I've got quite a few *rattler tails* to my belt but only because they were in the walkways where my dogs and toddler son at the time, traversed. I leave them alone if they are away from my animals and house but woe to them if they are not. I killed one over 6 feet long without its head when my then toddler son came running to me and said there was a huge snake in the walkway headed towards my dogs' kennel. I went up there and it was slowly wending its way along the footpath and while it was in motion, I dropped a 2x12 board end on its neck, pinned it, my son brought me my shovel and I decapitated it.
If its warm out and moving too fast, get a hose with cold water and soak it down, it will slow down and stop in its tracks, unable to move (being a cold blooded reptile). Once you've incapacitated with cold water, you can use a shovel to take off the head or I like to use limb loppers and its no danger when I get that close (loppers are about 3 feet long) and I work from behind the snake, loppers wide open and SNIP...off with its head.
Take very good care to NOT touch the head, venom is still potent and viable even 24 hours after its head has been separated from its body. Pick the head up with a shovel and drop it into a bucket, fill with water and just let it sit for a couple of days.