Hi Lisa, If I were you I'd probably stick with 0.5u tonight for a couple of reasons. First our kitties often have a habit of going lower in the night cycle than they do during the day. Secondly, you don't have any readings during the night cycle to see what she is actually doing. And as a side note, with those new to this dance, with little data, we generally suggest no shot if the pre shot reading is 200 or less and Smoky is not that much above.
The 0.5u today took Smokey's BG down but not excessively, so even though the pre shot reading was higher this morning, you still had some wiggle room. It would be very helpful if you could get a test 2 or 3 hours after the PM shot. This will give you an idea if Smokey does run lower at night and if she is dropping faster than expected, you can slow her down with some food. If you are not comfortable with this or can't test again before bedtime, then it's OK to skip the shot and start again tomorrow.
You're best bet for assistance is to post in Health. There are not a lot of Vetsulin users on the board although the numbers have increased a bit of late, so the Vetsulin forum doesn't tend to get much traffic. I saw your message in Health and came to have a look.