Quote Originally Posted by RichsBallPythons View Post
rats and mice in same room wont cause them to not breed. I do them in same room and they breed no problems. My rats are popping out rats like crazy right now. I havent ordered rats or mice in 2 years which is nice. But i will need to get about 200 live mice here shortly to get new groups going and what not.
Like I said. It doesn't happen with everyone, but there is a very large population of people that it DOESN'T work for. They have moved mice colonies in the same room, breeding stops, and moved them back out for it to start up again just fine. Rats are a natural predator of mice and sometimes this instinct kicks in. But as mentioned, it does not always.