HI Andrea,
You did just fine; Coco's high was likely his bouncing back from your nice blues yesterday. It's looking like this dose is working well for Coco, and I expect that you will see less and shorter bounces now.
You are correct to know that you do NOT want to hit green and best to be safe till you get your test results next week.
As your background may not be known to others, and many know little about insulin resistance, you may get some who say that it's OK to get green but they are very wrong. If you see numbers steadily dropping, get out a can of HC and be ready to open it and give the WHOLE CAN to Coco.
It looks like Coco was just doing one fine looking surfing on blues. He was pretty much where you wanted him to be. Because his numbers were up and down, it's sometimes hard to decide what to shoot, but you did fine to shoot the full dose, I think.
A dose of 7u is quite high, and there are acros who are low dose - my Shadoe surfed around 7-9u doses for quite awhile, but she is now at 17u. Cats who are getting doses around 7u should maybe look at the cause for such a high dose, be it need of dental, some illness, current meds, or even just needed food changes.
In some cases, a late nadir can give you your lowest BG right at ps; I usually wait for 2 rising BG numbers to be sure my Oliver is going in the right direction. Coco's rise to 175 looks pretty safe as he was on his way up.