From what you describe, it doesn't sound too serious to me although certainly merits watching. I'm glad to see that her stool looks normal now.

I am placing my bet on it being the rawhide too. Back when I had my collies I used to give them rawhide treats sometimes, but then Willie had upset stomach and a little blood in his stool once, and Cody got a piece kinda stuck in his throat (it gets so sticky and adhesive) and I had to reach in and pull it out, so I decided no more rawhides for them. Mine get Nylabones and dental bones for chews and bully sticks which seem safe and the dogs just love them. I've read since then that rawhide can cause bowel obstruction too. I know some dogs just gnaw it and don't really ingest much of it but after what I've read and with what happened to my RB boys, I just stay away from it.

I sure hope Beenie is all back to normal! Those pups can sure give us worries sometimes