Good job getting started!
I think a 0.25U reduction is ok, BUT the more conservative option since you can't be home for many days in a row would be a 0.5U reduction. Any history of ketones or DKA? Are you testing for ketones at home?
Couple of things I just want to baseline on:
- Why the urinary food? And which flavor/protein?
- The correct sequence is fast for 2 hrs before the preshot test, do the test, feed, then shoot (you can shoot with his head in the bowl if you wanted, just make sure he eats at least a tsp or so). No need to fast for midcycle tests, just the preshot ones so you have consistent data points to base decisions on
- When starting we say you can give the full dose if the preshot is 200 or higher. Under that
stall without feeding and post for help. You don't want to stall too long because then you'd be off schedule, and with your job you can't get too far off schedule. But honestly, any time you get an unusual number at any point feel free to ask for advice.
- what's current feeding schedule? We usually make the PS meals the largest, and give small snacks up til nadir. We try not to feed after nadir because the insulin is wearing off, but some cats can't go that long, so a small snack in the latter part of the cycle is ok.
- you will want to do a curve on your day off, ideally once a week. Testing every other hour. Whatever nighttime spot checks you can get are helpful as well, since they tend to go lower at night
Always err on the side of extra carbs when you get low numbers, especially with minimal data. Always good to post and ask for advice too. Eventually you'll get the hang of it

typically (for human meters) we save high carb food for the 40-49 range, or for really large drops that would result in low numbers; you want to test every 20-30 mins in that range. High carb + karo is for under 40, testing every 15 mins because the syrup wears off. 50-59 near best bet is medium carb food, test every 30 mins. Above 60 near nadir, just regular low carb, test every 30-45 mins. 70s+ near nadir generally doesn't need food, test 30-69 mins. Now, for each of those ranges - if you see those early in the cycle, bump up to the next carb category (so a 55 early in the cycle, give high carb). Again, when in doubt just throw carbs at him, ideally wet food carbs (dry carbs tend to stick around longer and make things more unpredictable).
Due diligence - food list with carbs is
here. Low carb (LC) is 9% and under. Medium carb (MC) is 10-15%. High carb (HC) is 16-20%. Very high carb is anything above that, but I keep some 22-25% foods on hand just in case.