Yes, I would guess 11 weeks +/-.
As Cz said, the Ultra Boost is certainly an option.
Our local grocer seems only to carry the mixed variety pack of Yobaby; it's a six pack with 3 different flavors. They like them all, but if I could buy the plan yogurt I would, but any of the Yobaby flavors are okay.
Your little one is very likely okay, but watch her closely for another week to make sure. Watch for things like poor balance, always turning to either the left or right, walking in a diagonal path, etc.
I have seen the wild babies here fall 70 feet and be okay. We have two babies in a nest box just next to the house and just this past weekend as mommy was trying to move nests a baby failed to make a jump from one branch to another and fell 50 feet. Mom ran down (and admittedly I did too!) and baby followed mom back up the tree... into the new nest. I see these babies every day and they are both doing well!
Lot's of folks have a squirrel safe room. Make sure you squirrel proof it... cover the outlets, no mini-blinds with those draw strings, etc.
Right, extremely important not to place them in the sun, even if it seems a cool day!
If you are feeding the proper diet, the formula and Henry's Healthy Blocks have all the Vitamin D (that they can get from sunlight) that is needed.
We never recommend taking a squirrel outdoors unless they are in a cage. The board is filled with hundreds of stories of squirrels that "self released" (ran off) and never got the needed benefits offered by the soft release process.
I do not take the squirrels outdoors until I am preparing them for release. My personal opinion is that taking them out doors and letting them experience that only to bring them back can be cruel. Of course, it is different for a squirrel that cannot be released due to health reasons; they should get some outdoor time I think as long as they respond well to their time outdoors and coming back in does not cause them anxiety, etc. On the flip side, I have 2 releases that come from outdoors to visit me inside my office every day (and I get anxious when they are a no-show on any given day) and many more I visit with out doors.