Quote Originally Posted by Crazy4Herps View Post
Rats have larger bones than mice, and therefore more calcium.
Actually, the exact opposite is true, based on the info on rodentpro's website:
http://www.rodentpro.com/qpage_articles_03.asp

Adult mouse = 2.98% calcium
Adult rat = 2.62% calcium

However, which one of those 2 is better for BPs is unknown.