I really, really wish I were as witty as my post indicated. 
this wonderfully precise detail and visual description deserves a second look.
Awesome.
Something sharp to slash or cut through the damned bag. I used to have to open feed bags for our horses, which were strung in the same way, and I never DID completely figure it out…when I did, I was elated, when I didn’t, I ended up frustrated and reaching for the nearest sharp implement. :mad:
Yes, there IS a string to pull and a perfect way to solve the puzzle, but I never had the patience to figure it out. Esp. with the horses agitating for their grain. 
The cat is pretty good, nay, outstanding at getting into a bag of cat or even dog food. Perhaps she could be trained with the proper reward…