If you are able. And you want every pup to have best chance NOT to get squished,,, seperate her from pups except at feeding time or under DIRECT supervision. That means you are ACTIVELY watching her interact with the pups. Not watching tv, working in the same room as the pups and mom are in, no distractions. If she isnt with them when you are not watching, she can't squish one.
I realize in most cases, its unrealistic to raise a litter as i just described. But on a weekend, you can do it,or on days u are off work and that gives your pups a couple of extra days of growing and maturing.
Thats a reason a good mama is worth her weight in gold. It's incredible how they can lie on a pup, and i've seen em lie on a 10-12 lb pup a squish it.
I used to think it's survival of the fittest, if a pup can't keep from getting squished, must be something wrong with it. I've seen too many thriving ,healthy pups squished to believe that anymore. I think mama's get tired, dog's can't count, and a "scootin" pup gets away from the group, it just gets squished.
"If you want to have friends, you have to be friendly" John D. Johnson