Oh no I wish I had seen this earlier...but it doesn't appear that there was much hope URI's in cavies are so dangerous and life threatening. Sounds like this might have been Popcorn's problem. Rest easy now, sweet cavy. From one cavy mom to another, please extend my most heartfelt sympathies to your friend. Safe journey to the Rainbow Bridge precious Popcorn. Look out for my Squeeker. He's a gentle little guy and will be welcoming you with open paws, I'm sure. {{{HUGS}}} Sandra