Those weights are perfectly fine to breed as long as they have good body condition and aren't particularly skinny. A female that is short and chunky, but at 1200g, will be a better breeding candidate than a long skinny 1900g female with no fat reserves for example.

Plus when they're building, they'll eat like mad and gain a few hundred grams. One of my females gained 800g in less than 3 months of breeding.

Sent from my DROID RAZR using Tapatalk 2