Noticed this article this morning on the BBC.
http://www.bbc.co.uk/news/health-39217858
The game is spot the errors in the article, then ask some interesting questions of it. Especially given this research:
http://www.abstractsonline.com/pp8/#!/4008/presentation/43884 Admittedly it's only a small sample, but it raises some interesting questions.
It showed that in the majority of cases, (73% of the time), CGM alerted ahead of dogs. Admittedly, the subject of the article may fall in the 27% or may not get on with CGM systems.
On the other hand, the rest of the article about dogs being biosensors was very interesting!