On Sunday afternoon (it's always on a Sunday, right?), Ringo started pacing to the litter box. He'd dig a hole, squat, and nothing came out. After a few times of this, I scooped the box, and found no clumps.
While our regular vet is closed on Sundays, another vet nearby has "urgent care" hours. I had taken Tucker there once before on a Saturday. They got Ringo in quickly.
Thankfully, he is not blocked, but his bladder was pretty empty so they could not get a urine sample. I opted for some sub-cutaneous fluids and several days' worth of pain medication. Since he had a bit of a problem with his anal glands, I had them express those. While they were about 1/2 full, they weren't the cause of his problem.
I got the cold shoulder the rest of the day, but it was worth it. It can be a dangerous thing if kitties get blocked.
We'll keep a close eye on him this week.