I'm not actually sure. It's been a few while..I did not know that!!!!! Do you know which is which???
But other than google... I like http://www.metzerfarms.com/index.cfm So much really good and informative information on their site.
Glad I decided to share, instead of assuming because you had the breed that you already knew. I guess plus even if you did, someone else who comes along in the future might not have.