[emma'smom]

Hey guys can anyone help me, I have always had males and now I have a female and I was wondering how long does the heat cycle last?
I was told by someone that it is a week coming in, a week in and a week going out.
and that it is the week that they are actually in heat that you have to worry about them getting breed. is this true?
Emma is 8 months now and my male is doing a lot of sniffing and I am keeping them apart and when they are together emma has a diaper on, If you can help I would really appreciate it
Thanks