They can breed, but they need to be carefully monitored and stop pairing if he goes off feed. Fertility is not always as good. I've done it and would do it again but not as a normal thing. Better to have a larger male that can afford to fast and not have dual sired clutches or reabsorbing females. It's a lot like breeding a 1200g female, can it be done, sure. In most circumstances it's better to wait a year though for better results.