I think he is actually trying to ask (for people who breed all year round) How do you know if the male/female is ready to go at that time of year...Not necessarily just if he/she is sexually mature enough to breed. I think I get the question, but I'm not sure how to answer it myself. I just know most people start in October/November. This is my first year, so I just followed the book and it seems to be working well for me.