first time i heard of this, a friend had a planned breeding with a first time mother (gsd's of course). the mother dropped the pups all over the kennel and cowered in the corner of th kennel geting as far away as possible from them snarling and bristles up. she killed two pups instantly before anyone could react. the shocked owners removed all the pups and lucky in that neighbourhood there were two pet dogs with litters that took on the pups straight away without fuss while still caring for their own pups. the pups have been surrogated and getting bottle supplements.
the female has an incredibly good temperament other than this and has zero dog agression and has owners kids playing with her and climbing all over her every other day before this happened - what went wrong??