I bred Secret Star (U-Nhan-Rha x Brick House) to her uncle Icon, and she had 4 absolutely spectacular pups. Couldn't be healthier or better-looking lil pups ...
The first sign of trouble was when Secret Star dropped her pups all about her pen, and tried to avoid contact with them at all; she had absolutely no maternal instinct whatsoever. This was a surprise to me because her mama Brick House is a great mother, as was Jezebel (as U-Nhan-Rha's sister Twilight). So I couldn't figure out why SS was such a shitty mama. Anyway, I placed SS and her pups in a crate, to "force" her to be with them, and she nursed them reluctantly for 3 weeks ... and then one day I came come to an absolute slaughter: she had attacked all of her pups and just massacred them: their skulls were all factured in a million pieces like egg shells.
I won't say what I did to Secret Star, because it wasn't pretty, but I sure wanted to make a "lasting impression" on her that such behavior was not to be tolerated. Her next breeding, to Silverback, she only had 1 pup, and I had to hand-raise it because she wanted to kill it as it was coming out of her. I bred her to Silverback again, and this time she had 9 pups, and after a few beatings (and me keeping her and her pups next to me 24/7), she raised them all to weaning age, which produced the pair you have.
If there is any mandibular mal-development, it has to be coming from her (even though she is basically okay), because Silverback has a very broad, powerful jaw whereas hers is a bit on the narrow side. Your pups also "pulled" from her side of the pedigree, appearance- and physique-wise. I am not sure I would have necessarily culled young pups, because they can develop and change as they get old (plus, you never know if they're talented and game, inspite of a handicap), so there are a lot of assumptions made through such decisions, but if this happened twice, then I wouldn't bother repeating it again.
Anyway, just a little 411 ...
Jack