You should be able to tell if it's giving her some response by her numbers. If she drops at all in a way you can tell is like onset, peak, duration and fade out, then it is working to some degree. The thing that you would want to be very careful of is if you got unexpired insulin and switched, you would probably want to cut the dose by half or something for the first couple of cycles until you find out how she will respond.
I really think that you should try to get one "good" pen from someone because it looks like she has been given expired insulin for several months and may not be getting any help from it. That is not good for her and could lead to serious issues like DKA.