This is exactly why I bought an autofeeder, so I didn't have to remember/get up to remove the food.
With Lantus you test/feed/shoot all within a few minutes of each other, you don't have to separate them.
Testing can be different from cycle to cycle, but we recommend getting a +2 or +3 to get an indicator of where the cycle may be heading. Some cycles you may get a break and can let her go the rest of the day, some cycles are more active and need closer monitoring.
I'd suggest browsing the Lantus forums and browsing some spreadsheets if you get a chance. Look at mine before July, you'll see if he was yellow or higher I pretty much let him be. Blues depended on the number trend (dropping vs flat, what time in the cycle), green is usually fairly close monitoring.