I wouldn't worry about a 103. Rosa's given me a few numbers in the low 100s too but she comes right back down an hour or so later. I don't like seeing the blue numbers show up either just in case it's the start of a slow rise so while I'm telling you not to worry, I worry about them a bit too when I see them but it's still within normal range and if you factor in the 20% meter variance, he could well still be in green really.