Are they on live rats? I would think you could do 60-80 gram rats with each of them for now. As you up the prey size, be attentive as to whether they eat within say 15/20 minutes...a larger rat can do damage. But don't stare at them while they eat, as your heat signature can disturb them.

I would be more worried about the female than the male. In fact, are you certain she's a female?

JonV