I am BRAND new to rat breeding. I built the common rack system using the "home depot mortor tubs'. I went to a local reptile shop that also sells feeders. To my dismay he did not have any "breeder size" rats available. He did have small rats that were basically 1 week past being weaned. I ended up buying 3.12. My question is how long until they are breeding size/age? Also do you guys think that 1.4 is a good ratio? Is there any place/websit/info as far as the growth and development of rats?