The key word here is "captive". I think you need to re-read this thread from the beginning - nowhere in this thread does it say the RGS is captive. From the OP's description it is a wild RGS which cadges food. Clearly it is surviving as a wild animal.
It would not be going from a caged or pet environment to having to fend for itself in the wild - it is displaying opportunistic behaviour.
Meanie's link & the information contained in it is relevant & valid & comes from an experienced, knowledgeable wildlife rehabber.
And I think you've missed quite a bit on that rehabber's site. Her instructions are for normal squirrels that act much different than RGS. First, I doubt the poster has other RGS in there custody to mingle with the one they are planning to capture, and does she plan to release it in her backyard? In the times it says to leave it "outside" and put things in it's cage, what exactly does she plan to put in there to stimulate and act as it's outside environment, since that website is clearly speaking in a tree squirrel's needs and NOT a RGS needs. But the biggest need is where she plans to release it. Anywhere but where she found it, could mean disaster. RGS need there own burrowing system, they will not go in others RGS burrows, and are very close knit family systems. Intruders are often attacked and killed (and eaten sometimes
). Let's say she finds somewhere with minimal amounts of the RGS, why would that be? I know in many cases around my city, the city is eradicating them, and many farms will shoot them. That's why I have Kesler, she was a "whistle dog", a RGS used to fish out other RGS so they (ranchers, farmers, etc) can kill the ones on there farms/homesteads. As for releasing it back to where she found it, what stops them from calling in another exterminator (or if they used poisons it can remain in the area for a long time) and then we're back at square one.
In my case, I called fish and feathers (Fish and wildlife) and they said that it was perfectly safe to keep her, but suggested I killed her because she was a pest. I have called a few wildlife sanctuaries and groups in the area and most have never heard of the "whistle dog" practice, but none are right now willing to take her. I keep searching for someone who'd take care of her, but none so far will. RGS in my area are seen more of a nuisance than anything else. There are far too many who see them as nothing as a pest, it is quite sad, but a fact. I would suggest that if she does wish to continue and catch this RGS, first find out what restrictions are in her area for having the animal, and most importantly, find out if anyone is willing to help. My city is not the only one that sees these as pests, and you may find yourself in a difficult situation...
In another rehabber's website that is for Californian Ground Squirrels, it states, "You should never raise a solo squirrel as they need to learn how to socialize, play and can bond too strongly to their caretaker. Call around and find someone with other squirrels of a similar age for companionship." (did this and found none, but you may have better luck). Also, a big problem is getting too attached, and bonding too much with the animal, which leads to "If they come up to a human after release and that human thinks the squirrel is trying to attack them, they may kill the squirrel." However, it is possible to rehabilitate, but it takes ALOT of time and effort and a good spot to release is key. Timing is Also everything since RGS hibernate. I think she'd have to find a new place and rehabilitate before August 1st. I would Suggest THIS site over that one, particularly page 10:
http://www.animaladvocates.us/cgsmanual.pdf
I may have over reacted last time, but you must be really careful with wildlife. It's sad that they are trying to kill them, they do quite a bit of good and often there killing measures cause alot of issues for other wildlife too (
http://www.v4a.org/files/protection or poison.pdf ) But you must realize MANY MANY people will consider the RGS a pest. I'd try and advocate the company and maybe find out the reasoning they have for the extermination.... is it because they are doing something destructive? Perhaps suggest better methods, such as landscaping (putting rocks in the area can deter them from an area) rather than killing them. And it might be good to note, that if they kill those ones, odds are others will show up eventually and take over the area, or a few will survive there methods and become immune to those methods, and possibly there young too, so they will have to do other methods that are more harmful and can be harmful to staff, etc. too if they come into contact with it...