eyes on health - newbie giving too much insulin?

[Wendy&Tiggy(GA)]

This newbie is giving her cat 1IU lantus BID but the cat only weighs 5lbs and she isn't home testing yet. 1IU seems a lot to me for such a small cat.. especially since its now also on ff classics.

http://felinediabetes.com/FDMB/viewtopic.php?f=28&t=90885