I would suggest talking to your vet in the AM. While I don't doubt that Mowgli has a UTI, the only way to know if he's on the appropriate AB is to get a sterile urine sample by cytocentesis (a needle is used to extract urine directly from the bladder) and then get a culture and sensistivity (C & S). It takes about 3 days to get the results of the culture back. It's likely that whatever AB Mowgli was on, didn't target the bacteria he has now. BTW, Noroclav is amoxicillin.
You might want to get hold of a probiotic. A lot of people here use FortiFlora. It's available through Amazon, although you may need to get it from you vet. I don't know if it's available via the internet in Canada.
It's quite likely that the UTI is what was causing the presence of ketones. Not enough insulin, an infection, and not eating are a recipe for DKA. Hopefully, this is all under control now. You are going to need to keep monitoring carefully both for ketones and BG levels. Dose may need to increase before it drops. You should also know that as the infection clears, BG levels can drop quickly.
I'm glad you're both home.
