cat food incorrectly packaged as dog food?

We feed our cat a quality dry cat food. A few weeks ago we bought a new bag and noticed that the shape of the food morsels had changed but thought little more about it. However, within a few days our cat started exhibiting problems with bowel movements, and howling occasional and seemingly unprompted cries of pain. She is normally a very quiet cat. We thought she might have eaten a mouse or something, but it continued. It took us about 3 weeks to come to the conclusion that it was the food. We took the half eaten bag of dry food back to the pet store and they confirmed it was dry dog food in a cat food package! Apparently there was some error at the factory. So my question is, what harm might our cat have suffered as a result of eating dog food? I know that canines and felines have very different dietary needs. Also, what type of compensation do you think would be appropriate for feeding our cat an incorrect diet for about a month. It clearly had an effect on her health. The pet food store wasn't even willing to return a full refund on the bag, but we placed calls to the manufacturer and understand we will now be compensated for the full cost of the mis-labeled bag ! They don't seem to be taking this very seriously, but it seems like a pretty major error, right?

I dont think a month on dog food is a big deal... Actually now cat and dog foods in the TRUE premiums both have taurine ... YES I would be upset but I hear stanger on a daily basis .... I wouldnt shop at the store that wouldnt refund the bag ... MOST premiums have a 100% satifaction or your money back right on the bag... OBVIOUSLY dog food in a cat bag is not a satifiying experience

If it were me, I just wouldn't buy that brand of food anymore