Thank you so much! I feel better if it's just the winter for it, and not something I should have been doing and didn't. It's been so bitter lately that he has just refused to go out for more than the absolute minimum time required for producing nos. 1 and 2, so I guess he's been holding it longer than he should. I try to get him out but he just stands in the courtyard, looking miserable and straining towards the door.
This forum and its members are invaluable resources - I had only thought of trying to relieve some of his discomfort but you are quite right, I should not do anything that would change the pH of his urine before I get it checked. I did remember from previous posts that many more UTIs are detected in the winter, when you have snow as contrast, but I didn't see any blood this morning (of course that doesn't mean it isn't there). He did get a Tramadol last night, though, since initially I thought it was his back that was bothering him. I don't think it did much for the UTI

Re the sample issue - my vet clinic works 9-3 on Sat so had I been able to obtain a viable sample, I would have dropped it off on my way to work today, when they were open and it was fresh. I think having to deal with a 3-day-old pee sample would be even worse than coping with Frozen Pee Hand! They will get it fresh from the source on Mon, though I might have to stop there first and get one of those little jars for collecting purposes - in desperation I tried a clean ziploc bag this morning and I think that was part of the problem.
We've done the usual pug stuff - eyes, knees, teeth, back (plus pancreatitis, which was entirely my fault) - but the UTI is a new one for us. Thank heaven there are the kind people of Pugalug Nation who are willing to share!
L
P.S. is it strange that I feel like I need to go all the time now, out of sheer sympathy?