You might be able to breed them in 2008. It all depends on the female being up to size...it generally takes 2-3 years for a female to reach breeding size. Then you just have to hit the odds.

I would buy a het female this year and a het male next...although when you buy pairs you are basically getting the male for free. Females take so long to raise...so they determine when you will be breeding.

I would by the hets now...and start growing up the female.