Kidney stones? Are you serious?

We had the pleasure of taking Simone to the emergency vet last night at 10pm. We had gone out to a birthday party, and when we got home, let Simone out to go potty. She was acting funny and kept squatting over and over again like she couldn't go. Gary grabbed the flashlight and we followed her around trying to see if we could catch a glimpse at what was --or wasn't-- coming out. On one of her last squats, we saw that her urine had blood in it, so we called our vet, who directed us to the urgent care clinic. Her thought was Simone was either passing a stone or had a massive infection. So, we took her back to Willamette (her old vet) because they were the only ones open, and she was seen by the on-call vet. He took an x-ray and didn't see any stones. He said it could be a bladder infection, but didn't take a urine sample. He prescribed some antibiotics (doxycycline) and pain pills and sent us home about an hour later. Simone seems to be feeling fine now, so we're hoping it was a stone that she passed. We plan to follow up with her regular vet tomorrow, and expect they will probably want to culture her urine to rule out a bladder infection. We're keeping our fingers crossed that it was an isolated stone passing incident and not another infection. We'll keep you posted.