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I believe only part of your question has come through. I am going to post below what it is that we can see on our end. I'm not seeing any info on the original episode. Can you provide this?
"My male cat is diabetic and I've been giving him insulin for a few months now. He is about 8-9 years old and weighs under 7 lbs. My vet has me feeding him Hill's rx A/D as of the first episode. His stomach is very bloated and he has urinated on himself at some point today while I was at work. This is the second time this has happened. The vet gave him antibiotic shot about 10 days ago when the first episode happened. What can I give him to relieve his obvious misery? "
My goodness, it sounds like he's had a rough time of it recently.
Based on your report, I would also be concerned about something more advanced happening. The tight and enlarged stomach is a concern, especially with the way that he's sitting. This suggests he's not comfortable. Have any xrays been taken of his abdomen? Any workup for his abdominal symptoms? Do you happen to have his labwork from a few months back available (or more recently, if applicable).